William Potter is a prolific author of children's non-fiction. He has also written and edited a wide range of well-known comics and magazines, such as Teenage Mutant Ninja Turtles, Sonic the Comic, Marvel Fact Files, Marvel Chess Specials and DC Chess Collection. He lives in Haslemere, UK. Leo Trinidad is an author, illustrator and animator based in Costa Rica. During the last 10 years he has been creating content as an author and illustrator for television and books, and has worked for entertainment and educational clients like Disney, Oxford University Press, and Dreamworks among others.