Dr Gareth Moore is the author of a wide range of brain-training and puzzle books for both children and adults. He is the creator of online brain training site www.BrainedUp.com and runs the daily puzzle website www.PuzzleMix.com. He gained his Ph.D from Cambridge University in the field of Machine Learning, and has contributed to various advanced projects for leading technology companies. Moreno Chiacchiera is an illustrator who works in communications and publishing, and has had work featured in several advertising campaigns. He lives near Lake Trasimeno, Italy.