| title | ISBN-13 | year of publication |
|---|---|---|
| Pirates, Manatees and Mermaids | 978-0-9800444-3-0 | 2010 |
| The Devil Fish | 978-0-9800444-1-6 | 2008 |
| The Great White Red Alert | 978-0-9800444-0-9 | 2008 |
| The Hammerheads of Treasure Island | 978-0-9800444-2-3 | 2010 |
G. T. · G. W. · G. Williams · Geoffrey Williams · T W · T. Williams