| California Trees & Wildflowers | (1991) | Description / Buy at Amazon |
| Nature BC | (1993) | Description / Buy at Amazon |
| California Seashore Life | (1997) | Description / Buy at Amazon |
| California Birds | (1997) | Description / Buy at Amazon |
| Southwestern Desert Life | (1997) | Description / Buy at Amazon |
| The Nature of Colorado | (1997) | Description / Buy at Amazon |
| The Nature of Washington | (1997) | Description / Buy at Amazon |
| California Wildlife | (1998) | Description / Buy at Amazon |
| Alaska Birds | (1998) | Description / Buy at Amazon |
| Weather: Clouds, Storms and Weather Patterns | (1998) | Description / Buy at Amazon |
| Wildlife of Carlsbad Caverns and Guadalupe Mountain National Park | (1998) | Description / Buy at Amazon |
| New York Wildlife | (1998) | Description / Buy at Amazon |
| New York Trees and Wildflowers | (1998) | Description / Buy at Amazon |
| Maine Wildlife | (1998) | Description / Buy at Amazon |
| Maine Trees and Wildflowers | (1998) | Description / Buy at Amazon |
| Massachusetts Wildlife | (1998) | Description / Buy at Amazon |
| Edible Plants | (1998) | Description / Buy at Amazon |
| Geology | (1999) | Description / Buy at Amazon |
| Tennessee Birds | (1999) | Description / Buy at Amazon |
| Assateague Island | (1999) | Description / Buy at Amazon |
| British Columbia Birds | (1999) | Description / Buy at Amazon |
| British Columbia Seashore Life | (1999) | Description / Buy at Amazon |
| Manitoba & Saskatchewan Birds | (1999) | Description / Buy at Amazon |
| British Columbia Trees & Wildflowers | (1999) | Description / Buy at Amazon |
| Worldwide Gestures | (1999) | Description / Buy at Amazon |
| Rocky Mountain Wildlife | (2000) | Description / Buy at Amazon |
| Western Coastal Birds | (2000) | Description / Buy at Amazon |
| Texas Trees & Wildflowers | (2000) | Description / Buy at Amazon |
| Golf Course Wildlife, Southeast Coast | (2000) | Description / Buy at Amazon |
| Animal Tracks | (2000) | Description / Buy at Amazon |
| Freshwater Fishes | (2000) | Description / Buy at Amazon |
| Georgia Birds | (2000) | Description / Buy at Amazon |
| Missouri Birds | (2000) | Description / Buy at Amazon |
| New Jersey Birds | (2000) | Description / Buy at Amazon |
| Virginia Birds | (2000) | Description / Buy at Amazon |
| Alabama Birds | (2000) | Description / Buy at Amazon |
| Colorado Birds | (2000) | Description / Buy at Amazon |
| Wisconsin Birds | (2000) | Description / Buy at Amazon |
| Pennsylvania Birds | (2000) | Description / Buy at Amazon |
| Illinois Birds | (2000) | Description / Buy at Amazon |
| Indiana Birds | (2000) | Description / Buy at Amazon |
| Maryland & DC Birds | (2000) | Description / Buy at Amazon |
| New York State Birds | (2000) | Description / Buy at Amazon |
| Instant Italian | (2000) | Description / Buy at Amazon |
| Instant European Spanish | (2000) | Description / Buy at Amazon |
| Saltwater Fishes | (2000) | Description / Buy at Amazon |
| Eastern Seashore Life | (2000) | Description / Buy at Amazon |
| New York: A Simplified Reference to Attractions, Dining & Public Transit | (2000) | Description / Buy at Amazon |
| Instant Latin American Spanish | (2000) | Description / Buy at Amazon |
| Golf Course Wildlife, Southern Florida | (2000) | Description / Buy at Amazon |
| Rome | (2000) | Description / Buy at Amazon |
| Sydney | (2000) | Description / Buy at Amazon |
| Galapagos Wildlife | (2001) | Description / Buy at Amazon |
| Texas Birds | (2001) | Description / Buy at Amazon |
| Los Angeles Birds | (2001) | Description / Buy at Amazon |
| Edible Wild Plants | (2001) | Description / Buy at Amazon |
| Costa Rica Wildlife | (2001) | Description / Buy at Amazon |
| Wilderness Survival | (2001) | Description / Buy at Amazon |
| Philadelphia Birds | (2001) | Description / Buy at Amazon |
| Butterflies & Moths | (2001) | Description / Buy at Amazon |
| Ohio Birds | (2001) | Description / Buy at Amazon |
| Rocky Mountain Birds | (2001) | Description / Buy at Amazon |
| Arizona Birds | (2001) | Description / Buy at Amazon |
| Florida Wildlife | (2001) | Description / Buy at Amazon |
| Florida Birds | (2001) | Description / Buy at Amazon |
| The Night Sky | (2001) | Description / Buy at Amazon |
| Emergency First Aid | (2001) | Description / Buy at Amazon |
| Gulf Coast Seashore Life and Animals | (2001) | Description / Buy at Amazon |
| Chicago Birds in Northeastern Illinois | (2001) | Description / Buy at Amazon |
| Northeastern Seashore Life | (2001) | Description / Buy at Amazon |
| Field Guide to the Grand Canyon | (2001) | Description / Buy at Amazon |
| Washington State Birds | (2001) | Description / Buy at Amazon |
| The Southern Night Sky | (2001) | Description / Buy at Amazon |
| Houston Birds | (2001) | Description / Buy at Amazon |
| Denver Birds | (2001) | Description / Buy at Amazon |
| Northwestern Seashore Life | (2001) | Description / Buy at Amazon |
| Wildlife of Denali National Park | (2001) | Description / Buy at Amazon |
| Southwest Desert Life & Animals | (2001) | Description / Buy at Amazon |
| Mushrooms | (2002) | Description / Buy at Amazon |
| Arizona Trees & Wildflowers | (2002) | Description / Buy at Amazon |
| Cattle & Horses | (2002) | Description / Buy at Amazon |
| Birds of Prey | (2002) | Description / Buy at Amazon |
| Arkansas Birds | (2002) | Description / Buy at Amazon |
| South Carolina Birds | (2002) | Description / Buy at Amazon |
| Bugs & Slugs | (2002) | Description / Buy at Amazon |
| West Virginia Birds | (2002) | Description / Buy at Amazon |
| Dogs | (2002) | Description / Buy at Amazon |
| Medicinal Plants | (2002) | Description / Buy at Amazon |
| Naples Wildlife | (2002) | Description / Buy at Amazon |
| Boston Birds | (2002) | Description / Buy at Amazon |
| Seattle Birds | (2003) | Description / Buy at Amazon |
| Invasive Plants, Western North America | (2003) | Description / Buy at Amazon |
| Caribbean Birds | (2003) | Description / Buy at Amazon |
| San Diego Birds | (2003) | Description / Buy at Amazon |
| Phoenix Birds | (2003) | Description / Buy at Amazon |
| Puerto Rico | (2003) | Description / Buy at Amazon |
| Gulf Coast Birds: A Folding Pocket Guide to Familiar Species | (2003) | Description / Buy at Amazon |
| Cats: A Simplified Visual Guide to Familiar North America Breeds | (2003) | Description / Buy at Amazon |
| South Dakota Birds | (2003) | Description / Buy at Amazon |
| Appalachian Trail Wildlife: An Introduction to Familiar Species | (2004) | Description / Buy at Amazon |
| Birds of Britain of England, Scotland & Wales | (2004) | Description / Buy at Amazon |
| Ducks: A Field Guide to Familiar North American Species | (2004) | Description / Buy at Amazon |
| Portland Birds: A Folding Pocket Guide to Familiar Species | (2004) | Description / Buy at Amazon |
| Golf Course Wildlife, Southern Arizona: A Folding Pocket Guide to Familiar Species | (2004) | Description / Buy at Amazon |
| Michigan Trees & Wildflowers | (2004) | Description / Buy at Amazon |
| Everglades Wildlife | (2004) | Description / Buy at Amazon |
| Oklahoma Trees and Wildflowers | (2004) | Description / Buy at Amazon |
| Dinosaurs: A Folding Pocket Guide to Familiar Species, Their Habits and Habitats | (2004) | Description / Buy at Amazon |
| World Flags: A Folding Pocket Guide to Prominent World Symbols | (2004) | Description / Buy at Amazon |
| Virginia Trees & Wildflowers | (2004) | Description / Buy at Amazon |
| Virginia Wildlife | (2005) | Description / Buy at Amazon |
| Oregon Wildlife | (2005) | Description / Buy at Amazon |
| Texas Seashore Life: A Folding Pocket Guide to Familiar Coastal Plants & Animals | (2005) | Description / Buy at Amazon |
| The Nature of Alaska | (2005) | Description / Buy at Amazon |
| The Nature of California | (2005) | Description / Buy at Amazon |
| The Nature of Florida | (2005) | Description / Buy at Amazon |
| The Nature of Arizona | (2005) | Description / Buy at Amazon |
| Yellowstone Wildlife of the Yellowstone Area | (2006) | Description / Buy at Amazon |
| Dangerous Animals & Plants | (2006) | Description / Buy at Amazon |
| Miami Birds: A Folding Pocket Guide to Familiar Species | (2006) | Description / Buy at Amazon |
| Knots: A Folding Pocket Guide to Purposeful Knots | (2006) | Description / Buy at Amazon |
| Nature of San Francisco & the Bay Area & Animals | (2006) | Description / Buy at Amazon |
| Southwestern Butterflies & Moths: A Folding Pocket Guide to Familiar Species | (2006) | Description / Buy at Amazon |
| Cape May Birds in Cape May County | (2007) | Description / Buy at Amazon |
| North Carolina Butterflies & Moths | (2007) | Description / Buy at Amazon |
| Ireland Birds: A Folding Pocket Guide to Familiar Species | (2007) | Description / Buy at Amazon |
| Assateague/Chincoteague Seashore Life: A Folding Pocket Guide to Familiar Species | (2007) | Description / Buy at Amazon |
| Costa Rica Birds | (2007) | Description / Buy at Amazon |
| Florida Butterflies & Moths | (2007) | Description / Buy at Amazon |
| Costa Rica Butterflies & Moths | (2007) | Description / Buy at Amazon |
| California Butterflies & Moths: An Introduction to Familiar Species | (2007) | Description / Buy at Amazon |
| Rocky Mountain National Park Wildlife: An Introduction to Familiar Species | (2007) | Description / Buy at Amazon |
| Texas Butterflies & Moths: A Folding Pocket Guide to Familiar Species | (2007) | Description / Buy at Amazon |
| Vermont Wildlife | (2008) | Description / Buy at Amazon |
| Pacific Northwest Butterflies & Moths | (2008) | Description / Buy at Amazon |
| Grasslands Birds | (2008) | Description / Buy at Amazon |
| Alaska Butterflies & Moths: A Folding Pocket Guide to Familiar Species | (2008) | Description / Buy at Amazon |
| New York State Butterflies & Moths | (2008) | Description / Buy at Amazon |
| Hawaii Butterflies & Moths | (2008) | Description / Buy at Amazon |
| Georgia Trees & Wildflowers | (2008) | Description / Buy at Amazon |
| Virginia Butterflies & Moths: A Folding Pocket Guide to Familiar Species | (2008) | Description / Buy at Amazon |
| Illinois Butterflies & Moths: A Folding Pocket Guide to Familiar Species | (2008) | Description / Buy at Amazon |
| Arizona Butterflies & Moths: A Folding Pocket Guide to Familiar Species | (2008) | Description / Buy at Amazon |
| Montana Butterflies & Moths: A Folding Pocket Guide to Familiar Species | (2008) | Description / Buy at Amazon |
| Rocky Mountain Butterflies & Moths: A Folding Pocket Guide to Familiar Species | (2008) | Description / Buy at Amazon |
| Great Smoky Mountains Trees and Wildflowers | (2008) | Description / Buy at Amazon |
| Massachusetts Butterflies & Moths: A Folding Pocket Guide to Familiar Species | (2008) | Description / Buy at Amazon |
| Colorado Butterflies & Moths: A Folding Pocket Guide to Familiar Species | (2008) | Description / Buy at Amazon |
| Ohio Butterflies & Moths: A Folding Pocket Guide to Familiar Species | (2008) | Description / Buy at Amazon |
| Great Lakes Butterflies & Moths: A Folding Pocket Guide to Familiar Species | (2008) | Description / Buy at Amazon |
| Cape Cod Seashore Life: A Folding Pocket Guide to Familiar Plants & Animals in the Cape Cod Region | (2008) | Description / Buy at Amazon |
| Ohio Trees and Wildflowers | (2008) | Description / Buy at Amazon |
| New Jersey Butterflies & Moths | (2008) | Description / Buy at Amazon |
| Minnesota Butterflies & Moths: A Folding Pocket Guide to Familiar Species | (2008) | Description / Buy at Amazon |
| Indiana Butterflies & Moths: An Introduction to Familiar Species | (2008) | Description / Buy at Amazon |
| Pennsylvania Butterflies & Moths: A Folding Pocket Guide to Familiar Species | (2008) | Description / Buy at Amazon |
| Kentucky Trees & Wildflowers | (2008) | Description / Buy at Amazon |
| Maryland & DC Trees & Wildflowers | (2008) | Description / Buy at Amazon |
| House & Garden Pests: How to Organically Control Common Invasive Species | (2008) | Description / Buy at Amazon |
| Grasslands Trees & Wildflowers: A Folding Pocket Guide to Familiar Species | (2008) | Description / Buy at Amazon |
| Field Guide to the Santa Rosa & San Jacinto Mountains National Monument: A Folding Pocket Guide to Familiar Species | (2008) | Description / Buy at Amazon |
| South Carolina Butterflies & Moths | (2009) | Description / Buy at Amazon |
| West Virginia Butterflies & Moths | (2009) | Description / Buy at Amazon |
| Kansas Butterflies & Moths | (2009) | Description / Buy at Amazon |
| Maine Butterflies & Moths: An Introduction to Familiar Species | (2009) | Description / Buy at Amazon |
| Animal Skulls & Bones Laminated | (2010) | Description / Buy at Amazon |
| Delaware Trees & Wildflowers | (2010) | Description / Buy at Amazon |
| Pacific Northwest Beachcomber | (2010) | Description / Buy at Amazon |
| European Backyard Birds: A Folding Pocket Guide to Familiar Species | (2010) | Description / Buy at Amazon |
| New England Beachcomber: A Waterproof Pocket Guide to Beach Habitats, Plants & Animals from Connecticut to Maine | (2010) | Description / Buy at Amazon |
| Middle East Wildlife | (2010) | Description / Buy at Amazon |
| Camping 101: A Waterproof Pocket Guide to What a Novice Needs to Know | (2010) | Description / Buy at Amazon |
| Boat & Water Safety: A Waterproof Pocket Guide to Safe Practices & Procedures | (2010) | Description / Buy at Amazon |
| Field Dressing Game | (2010) | Description / Buy at Amazon |
| Birds of the Missouri River Corridor, Cascade County, Montana: An Introduction to Familiar Species | (2010) | Description / Buy at Amazon |
| Disaster Survival | (2010) | Description / Buy at Amazon |
| Combat First Aid: A Waterproof Pocket Guide to What to do BEFORE Emergency Medical Help Arrives | (2010) | Description / Buy at Amazon |
| Waterfowl | (2010) | Description / Buy at Amazon |
| Utah Wildlife | (2010) | Description / Buy at Amazon |
| Wisconsin Wildlife | (2010) | Description / Buy at Amazon |
| Dog Care: An Introduction to Dogs & the Essentials of Dog Care | (2010) | Description / Buy at Amazon |
| Cat Care: An Introduction to Cats & the Essentials of Cat Care | (2010) | Description / Buy at Amazon |
| Horse Care: A Folding Pocket Guide to Horses & the Essentials of Horse Care | (2010) | Description / Buy at Amazon |
| Delaware Wildlife: An Introduction to Familiar Species | (2011) | Description / Buy at Amazon |
| Beetles: A Folding Pocket Guide to Familiar North American Species | (2011) | Description / Buy at Amazon |
| Dog Breeds: A Field Guide to 50 of the Most Popular Breeds | (2011) | Description / Buy at Amazon |
| Cat Breeds: A Field Guide to 40 of the Most Popular Breeds | (2011) | Description / Buy at Amazon |
| Volcanoes: A Waterproof Pocket Guide to the Types of Volcanoes, Flows & Rocks Formed | (2011) | Description / Buy at Amazon |
| Upper Mississippi River National Wildlife & Fish Refuge: An Introduction to Common Species | (2011) | Description / Buy at Amazon |
| Manitoba Birds: A Folding Pocket Guide to Familiar Species | (2012) | Description / Buy at Amazon |
| Elk & Bison Prairie Field Guide: Land Between the Lakes | (2012) | Description / Buy at Amazon |
| Maryland & DC Wildlife | (2012) | Description / Buy at Amazon |
| Amazon Wildlife | (2012) | Description / Buy at Amazon |
| Freshwater Fishing: A Folding Pocket Guide to What a Novice Needs to Know | (2012) | Description / Buy at Amazon |
| Outdoor Knots: A Folding Pocket Guide to Essential Outdoor Knots | (2012) | Description / Buy at Amazon |
| Antarctic Wildlife of the Antarctic and Subantarctic Environments | (2013) | Description / Buy at Amazon |
| Sierra Nevada Trees & Wildflowers of the Montane Forest Region | (2013) | Description / Buy at Amazon |
| Sierra Nevada Birds | (2013) | Description / Buy at Amazon |
| Alien Invaders in Nature: A Folding Pocket Guide to North America’s Most Aggressive Invasive Plants & Animals | (2013) | Description / Buy at Amazon |
| Hawaii Seashore Life | (2014) | Description / Buy at Amazon |
| The World of Bears | (2014) | Description / Buy at Amazon |
| Arctic Wildlife & Plants of the Arctic and Subarctic Regions | (2014) | Description / Buy at Amazon |
| Hurricane Survival: Prepare For & Survive a Hurricane | (2014) | Description / Buy at Amazon |
| Guide to Portland Birds : An Introduction to Familiar Species | (2014) | Description / Buy at Amazon |
| Chicago Birds: A Folding Pocket Guide to Familiar Species | (2016) | Description / Buy at Amazon |
| Extreme Heat Survival – Australia: Prepare for and Survive a Heatwave | (2016) | Description / Buy at Amazon |
| Medicinal Survival Plants of the Rocky Mountains: A Folding Pocket Guide to Familiar Species | (2016) | Description / Buy at Amazon |
| Indiana Nature Set | (2016) | Description / Buy at Amazon |
| North Carolina Nature Set | (2016) | Description / Buy at Amazon |
| Pennsylvania Nature Set | (2016) | Description / Buy at Amazon |
| Utah Nature Set | (2016) | Description / Buy at Amazon |
| Virginia Nature Set | (2016) | Description / Buy at Amazon |
| Yucatan Birds: A Folding Pocket Guide to Familiar Species of the Yucatan Peninsula | (2016) | Description / Buy at Amazon |
| Saltwater Game Fish: A Folding Pocket Guide to Popular North American Species | (2016) | Description / Buy at Amazon |
| Trout & Salmon: A Folding Pocket Guide to North American Salmonids | (2016) | Description / Buy at Amazon |
| Bass & Freshwater Game Fish: A Folding Pocket Guide to Popular North American Species | (2016) | Description / Buy at Amazon |
| Oregon Trees & Wildflowers | (2017) | Description / Buy at Amazon |
| New Mexico Trees & Wildflowers | (2017) | Description / Buy at Amazon |
| Florida Seashore Life: A Folding Pocket Guide to Familiar Plants and Animals | (2017) | Description / Buy at Amazon |
| Japan Birds | (2017) | Description / Buy at Amazon |
| Minnesota Wildlife | (2017) | Description / Buy at Amazon |
| East Africa Wildlife | (2017) | Description / Buy at Amazon |
| Florida Nature Set | (2017) | Description / Buy at Amazon |
| Idaho Nature Set | (2017) | Description / Buy at Amazon |
| Oklahoma Nature Set | (2017) | Description / Buy at Amazon |
| Washington State Nature Set | (2017) | Description / Buy at Amazon |
| California Nature Set | (2017) | Description / Buy at Amazon |
| Colorado Nature Set | (2017) | Description / Buy at Amazon |
| East Africa Birds | (2017) | Description / Buy at Amazon |
| Montana Nature Set | (2018) | Description / Buy at Amazon |
| Foraging for Wild Edible Foods | (2018) | Description / Buy at Amazon |
| Dragonflies & Damselflies | (2018) | Description / Buy at Amazon |
| The Moon | (2018) | Description / Buy at Amazon |
| Sierra Nevada Trees & Wildflowers | (2018) | Description / Buy at Amazon |
| Alaska Nature Set | (2018) | Description / Buy at Amazon |
| Georgia Nature Set | (2018) | Description / Buy at Amazon |
| Sierra Nevada Nature Set | (2018) | Description / Buy at Amazon |
| Bees & Other Pollinators | (2018) | Description / Buy at Amazon |
| Roadside Wildflowers | (2018) | Description / Buy at Amazon |
| Bugwatchers: Pocket Guides to Beetles, Bugs and Slugs and Dragonflies | (2018) | Description / Buy at Amazon |
| Game Fishes of North America: Pocket Guides to the Most Popular Freshwater and Saltwater Species | (2018) | Description / Buy at Amazon |
| Invasive Weeds of North America | (2019) | Description / Buy at Amazon |
| Italy Birds | (2019) | Description / Buy at Amazon |
| Germany Birds: A Folding Pocket Guide to Familiar Species | (2019) | Description / Buy at Amazon |
| Edmonton Birds: A Folding Pocket Guide to Familiar Species | (2019) | Description / Buy at Amazon |
| Seashells | (2020) | Description / Buy at Amazon |
| Arizona Butterflies & Pollinators: A Folding Pocket Guide to Familiar Species | (2020) | Description / Buy at Amazon |
| New Jersey Butterflies & Pollinators: A Folding Pocket Guide to Familiar Species | (2020) | Description / Buy at Amazon |
| South Carolina Butterflies & Pollinators: A Folding Pocket Guide to Familiar Species | (2020) | Description / Buy at Amazon |
| Rocky Mountain Butterflies & Pollinators: A Folding Pocket Guide to Familiar Species | (2020) | Description / Buy at Amazon |
| Minnesota Butterflies & Pollinators: A Folding Pocket Guide to Familiar Species | (2020) | Description / Buy at Amazon |
| New York State Butterflies & Pollinators: A Folding Pocket Guide to Familiar Species | (2020) | Description / Buy at Amazon |
| Southwest Butterflies & Pollinators: A Folding Pocket Guide to Familiar Species | (2020) | Description / Buy at Amazon |
| New England Butterflies & Pollinators: A Folding Pocket Guide to Familiar Species | (2020) | Description / Buy at Amazon |
| Pacific Northwest Butterflies & Pollinators: A Folding Pocket Guide to Familiar Species | (2020) | Description / Buy at Amazon |
| Illinois Butterflies & Pollinators: A Folding Pocket Guide to Familiar Species | (2020) | Description / Buy at Amazon |
| Hunting Essentials: A Folding Pocket Guide to Equipment and Skills for Rookie Hunters | (2021) | Description / Buy at Amazon |
| Day Hiking New Hampshire | (2021) | Description / Buy at Amazon |
| Day Hiking Colorado | (2021) | Description / Buy at Amazon |
| Day Hiking Maine | (2021) | Description / Buy at Amazon |
| Eastern Coastal Birds | (2022) | Description / Buy at Amazon |