Written and illustrated by Annie Horwood:

Art Funstation (Design Eye 1994)
Rocky Racoon and Friends (Whitecap Books 1997)
Cats go... (Michael O'Mara Books 2000)
Dogs go... (Michael O'Mara Books 2000)
Posers and Puzzles (The Pony Club 2003)
Tricky Tests and Teasers (The Pony Club 2004)
Trace, Copy and Colour (The Pony Club 2004)
Games, Gags and Guesses (The Pony Club 2006)
The Pony Club Junior Activity Book (The Pony Club 2008)
Design and Doodle with The Pony Club (The Pony Club 2012)

Illustrated by Annie Horwood:

Rudolph's Christmas Fun Book (Martyn Forrester, Puffin 1990)
The Slippers that Talked (Gyles Brandreth, Puffin 1992)
Dear Billy and Other Stories (Leila Berg, Viking 1992)
The Great Granny Dust-Up (Andrew Matthews, Hamish Hamilton 1992)
The Early Times Book of Puzzles (Puffin 1993)
The Slippers that Sneezed (Gyles Brandreth, Viking 1994)
Frogmarsh Farm Play Set (Gina Bencraft, Michael O'Mara Books 1998)
Ladybird, Ladybird (Michael O'Mara Books 1999)
Butterfly Flutterby (Michael O'Mara Books 1999)
Buzz Buzz Bee (Michael O'Mara Books 1999)
The Slippers that Answered Back (Gyles Brandreth, Puffin 1999)
Busy Day Train (Michael O'Mara Books 2000)
My First Big Book of Words (Buster Books 2001)