Marnie Edwards is the pseudonym of Nosy Crow’s fiction editor, Kirsty Stansfield. She works on the Mega Mash-Up books with Nikalas Catlow and Tim Wesson, and when retailers and parents started asking for books in the same format that were a little less "boysy," Kirsty decided to rise to the challenge. She lives in London with her husband and three children.

Leigh Hodgkinson is the author and illustrator of Goldilocks and Just One Bear and illustrator of the Magical Mix-Ups series. She worked as art director on the BAFTA award-winning animated series Charlie and Lola. She is absolutely passionate about writing, making things up, and daydreaming. Leigh Hodgkinson lives in Surrey, England, and is married with a baby daughter.