Diego Vaisberg is an illustrator and art director based in Buenos Aires, Argentina. He is experienced in children's books, games and toy design and is the author of Dino, a Pet like no other and Space Cadet Topo. He is also a professor of illustration and design at Palermo University (UP) in Buenos Aires. Dr Gareth Moore is one of the world's leading puzzle-setters. He is the author of more than 75 brain-training titles including The Ordnance Survey Puzzle Book, which has sold more than 120,000 copies in the UK. He is also the creator of Brained Up, a cutting-edge brain training site offering scientifically designed daily sessions to help you make the most of your brain.