From the record-breaking, Number One bestselling author of KAY'S ANATOMY comes the funniest, most fact-filled and most disgusting activity book about the body ever written!

This new Adam Kay activity book contains over 500 hilarious, disgusting activities - codes to crack, experiments, recipes and more, including 144 all-new "True or Poo" quiz questions!

Do you know your patella from your paella? Have you ever tasted phlegm soup? Want to learn how to bunk off school with a fake plaster cast? It's guaranteed to challenge, entertain and revolt readers aged 7 to 739.

Adam Kay's children’s books have been translated into 32 languages and sold over 1 million copies, making him one of the UK’s bestselling children’s authors. Kay’s Anatomy became the fastest-selling children’s general non-fiction hardback of the decade and his first children’s novel, Dexter Procter the 10-Year-Old Doctor, was the No. 1 children’s hardback fiction debut of 2025.

Praise for Kay's Anatomy:

'An enjoyably gross look at the human body. Hours of gruesome fun guaranteed'

'Like listening to a teacher who makes pupils fall about' - Sunday Times

'Totally brilliant!' - Jacqueline Wilson

'Fun and informative' - Malorie Blackman

'Very funny - this exciting book is bound to inspire the next generation of medics' - Sunday Express

Praise for Kay's Marvellous Medicine:

'A ridiculously funny read that will delight, gross out and educate all at the same time' - Independent

'Educational and entertaining. It should be on the national curriculum!' - Harry Hill

'Completely marvellous and very funny' - BookTrust