| Hiccup Horrendous Haddock III Series | |
| The Seasick Viking | 1999 |
| How To Train Your Dragon | 2003 |
| How To Be A Pirate | 2004 |
| How To Speak Dragonese | 2005 |
| How To Cheat A Dragon's Curse | 2006 |
| How To Train Your Viking, by Toothless | 2006 |
| A Hero's Guide To Deadly Dragons | 2007 |
| How To Twist A Dragon's Tale | 2007 |
| The Heroic Misadventures of Hiccup The Viking: The First Collection (omnibus) | 2007 |
| Dragon Training and Swordfighting Tips | 2008 |
| How To Seize A Dragon's Fire | 2008 |
| Picture Books | |
| Little Bo Peep | 1998 |
| Don't Do That Kitty Kilroy | 1999 |
| What Shall We Do With The Boo-Hoo Baby? | 2000 |
| One Too Many Tigers | 2001 |
| Claydon Was A Clingy Child | 2001 |
| Super Sue at Super School | 2003 |
| There's No Such Thing as a Ghostie | 2004 |
| Daddy on the Moon | 2005 |
| That Rabbit Belongs To Emily Brown | 2006 |
| Emily Brown and the Thing | 2007 |