Tunnels Books In OrderPublication Order of Tunnels BooksOne Response to “Tunnels”Leave a Reply
| Tunnels | (2007) | Description / Buy at Amazon |
| Deeper | (2008) | Description / Buy at Amazon |
| Freefall | (2009) | Description / Buy at Amazon |
| Closer | (2010) | Description / Buy at Amazon |
| Spiral | (2011) | Description / Buy at Amazon |
| Terminal | (2013) | Description / Buy at Amazon |