Gareth Moore (B.Sc (Hons) M.Phil Ph.D) is the internationally bestselling author of a wide range of brain-training and puzzle books for both children and adults. His books have sold over a million copies in the US alone He is also the creator of online brain-training site BrainedUp.com and runs the daily puzzle site PuzzleMix.com. Chris Dickason's illustrations are populated with rambunctious characters that are a cleverly crafted mix of an uncomplicated line style and wonky perspectives.

Taking inspiration as much from Henri Matisse as he does The Muppets , Chris' work has been described as charming and visually striking with a sharp graphic style. He is the illustrator of Buster Books' bestselling Clever Kids series.