A brand new book in the bestselling NAUGHTIEST UNICORN series - the funniest unicorn books EVER! The perfect gift for Easter or for readers of 6+ and fans of The Worst Witch and Pamela Butchart. It's spring time at Unicorn School and time for a super fun scavenger hunt! But when Dave the naughtiest unicorn uncovers a mysterious, hidden RIDDLE the day gets even MORE exciting! Will the riddle it will lead them to some TREASURE? One thing is for sure, with Dave around they are bound to have lots of FUN along the way! Pip Bird is the pseudonym for a small group of brilliant, funny children's book writers. They all believe in magic and dream of having a Unicorn Best Friend Forever. The Naughtiest Unicorn series: The Naughtiest Unicorn The Naughtiest Unicorn at Sports Day The Naughtiest Unicorn and the School Disco The Naughtiest Unicorn at Christmas The Naughtiest Unicorn on a School Trip The Naughtiest Unicorn on the Beach The Naughtiest Unicorn and the Spooky Surprise The Naughtiest Unicorn on Holiday The Naughtiest Unicorn in a Winter Wonderland