Brand new red Early Reader story. Horrid Henry is in for a surprise when he tries to cause havoc on a sleepover in this hilarious story perfect for Early Readers, from multi-million-copy selling author, Francesca Simon, and David Walliams' illustrator, Tony Ross.

Francesca Simon spent her childhood on the beach in California, and then went to Yale and Oxford Universities to study medieval history and literature. She now lives in London with her family. She has written over 50 books and won THE CHILDREN'S BOOK OF THE YEAR in 2008 at the Galaxy British Book Awards for HORRID HENRY AND THE ABOMINABLE SNOWMAN. Visit Francesca's website at www.francescasimon.com and keep up-to-date with Horrid Henry at www.horridhenry.co.uk. You can also follow her on Twitter @simon_francesca Tony Ross is one of the most popular and successful of all children's illustrators, with many picture books to his name. He has also produced line drawings for many fiction titles.