Chris Grabenstein is the author of the New York Times bestsellers The Island of Dr. Libris and Escape from Mr. LemonCello's Library as well as the co-author (with James Patterson) of the #1 Bestselling series I Funny, House of Robots, and Treasure Hunters.

Juliana Neufeld is a Canadian children's book illustrator and comic artist, known for her work on Treasure Hunters, the bestselling middle grade series by James Patterson, as well as her collaborations with multidisciplinary artist Vivek Shraya. Juliana's work is inspired by folk art, classic children's literature and small moments of connection and humour in everyday life. She lives in Toronto, Ontario.