Michael Dahl is the prolific author of the bestselling Goodnight Baseball picture book and more than 200 other books for children and young adults. He has won the AEP Distinguished Achievement Award three times for his nonfiction, a Teacher's Choice award from Learning magazine, and a Seal of Excellence from the Creative Child Awards. And he has won awards for his board books for the earliest learners, Duck Goes Potty and Bear Says "Thank You!" Dahl has written and edited numerous graphic novels for younger readers, authored the Library of Doom adventure series, the Dragonblood books, Trollhunters, and the Hocus Pocus Hotel mystery/comedy series. Dahl has spoken at schools, libraries, and conferences across the US and the UK, including ALA, AASL, IRA, and Renaissance Learning. He currently lives in Minneapolis, Minnesota in a haunted house. Xavier Bonet is an illustrator and comic-book artist who resides in Barcelona. Experienced in 2D illustration, he has worked as an animator and a background artist for several different production companies. He aims to create works full of color, texture, and sensation, using both traditional and digital tools. His work in children's literature is inspired by magic and fantasy as well as his passion for the art.