Steve Brezenoff is the author of more than fifty middle-grade chapter books, including the Field Trip Mysteries series, the Ravens Pass series of thrillers, and the Return to the Titanic series. He's also written three young-adult novels, Guy in Real Life; Brooklyn, Burning; and The Absolute Value of -1. In his spare time, he enjoys video games, cycling, and cooking. Steve lives in Minneapolis with his wife, Beth, and their son and daughter.;Spanish born Marcos Calo began his career working for various Spanish animation studios as a concept artist for CGI movies. During that time he also worked freelance doing illustration, commercial work, and occasionally comic books. Marcos usually works digitally, although he still likes to start his drawings on paper first. After wandering around different cities, he is finally settled in A Coru–a, where his collection of comics and picture books is always growing.