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.

Todd Ouren has been a professional artist for over 20 years. Todd has illustrated and designed numerous award-winning books and greeting cards. Raised near Fergus Falls, Minnesota, Todd now lives in Mankato, Minnesota with his wife and three boys. In our spare time we enjoy watching our kids play sports, traveling, hiking, kayaking and spending time at the lake. Todd Ouren is a published author and an illustrator of children's books.