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.