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. The Prince and the Witch and the Thief and the Bears, illustrated by Jez Tuya, was his first picture book.
David Roberts is the author-illustrator of the Dirty Bertie books and the illustrator of many books for children, including the bestselling Rosie Revere, Engineer and Ada Twist, Scientist, written by Andrea Beaty, several titles by Julia Donaldson, the Kate Greenaway-shortlisted The Dunderheads, written by Paul Fleischman, and the picture books The Dumpster Diver, written by Janet S. Wong, and His Royal Tinyness, written by Sally Lloyd-Jones. Find him online at davidrobertsillustration.com.