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. Tim Levins is best known for his work on the Eisner Award-winning DC Comics series Batman: Gotham Adventures. Tim has illustrated other DC titles, such as Justice League Adventures, Batgirl, Metal Men, and Scooby Doo, and has also done work for Marvel Comics and Archie Comics. Tim enjoys life in Midland, Ontario, Canada, with his wife, son, dog, and two horses. Luciano Vecchio currently lives in Buenos Aires, Argentina. With experience in illustration, animation, and comics, his works have been published in the US, Spain, UK, France, and Argentina. His credits include Ben 10 (DC Comics), Cruel Thing (Norma), Unseen Tribe (Zuda Comics), Sentinels (Drumfish Productions), and several DC Super Heroes books for Stone Arch Books.