Brilliant Horrid Henry 16 book set includes the book numbers: 
1/2/3/4/6/8/9/10/11/13/14/15/16/20/21/22
Horrid Henry books and audio have sold over 15 million copies in the UK alone and CITV have made a hugely popular cartoon series based on the nation's favourite naughty boy. 2008 saw a Horrid Henry exhibition at Seven Stories, Newcastle called Up To Mischief With Horrid Henry.