Keir GraffJames Patterson is the world's bestselling author. The creator of the Max Einstein and Middle School series, he founded JIMMY Patterson to publish books that young readers will love. He lives in Florida with his family.

Keir Graff i thrilled to collaborate with James Patterson on the Minerva Keen series. His funny and fantastical middle-grade adventure novels include The Tiny Mansion, The Phantom Tower (a Chicago Tribune Best Children's Book), and The Matchstick Castle (an official Illinois Reads selection). He lives in Chicago. Read More Read Less