Jessica Greenwell grew up in Wolverhampton then studied English at Leeds University. She joined Usborne in 2008 and has since written lots of wipe-clean, sticker, colouring and noisy books. She lives in Oxfordshire with her husband and two young sons, and when she's not playing pirates or dinosaurs, she's writing books about them instead. Nikki Dyson is the bestselling illustrator of Oscar the Hungry Unicorn, Oscar the Hungry Unicorn Eats Christmas and You're Called What?! Her other books include Dinosaurs Don't Have Bedtimes, Zippo the Super Hippo and Mack and the Missing Cheese. She lives in Northamptonshire.