Chris Priestley is the multi award-winning author of the Tales of Terror series and the hugely popular and award-winning Mister Creecher.

He is also a talented artist and illustrator, and his cartoons have been published in The Independent as well as other national newspapers. He lives in Cambridge.

David Roberts is the author-illustrator of the Dirty Bertie books and the illustrator of many books for children, including the Kate Greenaway-shortlisted The Dunderheads, written by Paul Fleischman, the bestselling Rosie Revere, Engineer and Ada Twist, Scientist, both written by Andrea Beaty and Julian Clary's The Bolds series. Born in Liverpool, he now lives in London.