Chris Priestley had been a successful illustrator, political cartoonist, and strip cartoonist for twenty years before publishing his first work of fiction for young readers. Among his novel credits are Still Water , Seven Ghosts , and Freeze , each evidence of the inspiration he finds in the gothic genre and in authors such as Edgar Allan Poe and Mary Shelley. He is best-known for his award-winning Tales of Terror series, illustrated by David Roberts, which has been translated into many languages and been performed as plays in several countries. Chris Priestley has also contributed an illustrated story to Hellboy: An Assortment of Horrors . He lives in Cambridge, England. Mariachiara Di Giorgio studied illustration in Rome and Paris and worked as a storyboard artist and concept designer for movies and advertising agencies. Her picture books include Mr. Lepron's Mystery Soup and Professional Crocodile, both by Giovanna Zoboli, and The Midnight Fair by Gideon Sterer, which won a Yoto Carnegie Shadowers' Choice Award for Illustration and was named a Kirkus Reviews Best Picture Book of the Year, a Booklist Editors' Choice, and a Shelf Awareness Best Book of the Year.

Mariachiara Di Giorgio lives in Rome.