Alastair Chisholm began his career as a software developer in Edinburgh. His interest in devising and tackling logical problems led him to create the hugely successful Kids Book of Sudoku and Kids Book of Karuko puzzle book series. He is the author of the highly-acclaimed sci-fi adventure Orion Lost (Nosy Crow) and picture books The Prince and the Witch and the Thief and the Bears, its companion title, The Tale of the Valiant Ninja Frog, both illustrated by Jez Tuya, and award-winning Inch and Grub, illustrated by David Roberts. Alastair lives in Edinburgh. Find him online at alastairc.com, on Instagram as @alastairchisholm and on Twitter @alastair_ch. Jez Tuya has been a professional illustrator for over ten years. During this time, he has worked for many clients in children's book publishing and has designed characters for animated films and television shows. He currently lives in Wellington, New Zealand. Follow Jez on Twitter as @jez_tuya and in Instagram as @jeztuya.