Jim Gigliotti is a writer based in Southern California. A former editor at the National Football League, he has written more than 50 books for readers of all ages, including biographies for young readers on Olympian Jesse Owens, baseball star Roberto Clemente, and musician Stevie Wonder.

Karl James Mountford is an illustrator who works in both traditional and digital media. He has created artwork for such titles as 'The Uncommoners' by Jennifer Bell and 'The Peculiars' by Kieran Larwood. Karl currently lives and works in Wales, where his sketch books rarely get a day off.