Author/illustrator Geoff Stevenson is a former award-winning advertising copywriter and played the beloved Dr. Beardfacé on the TV sitcom Scrubs. He has written for Nickelodeon in both Australia and America and illustrated thirteen books, including the bestselling The Invisible String. Visit him at Facebook.com/GeoffStevensonAKADrBeardface.

Stephen Savage is the author and illustrator of nine books for children, including the New York Times bestselling picture book Polar Bear Night, written by Lauren Thompson. He is the creator of the Where's Walrus books, Supertruck, and Little Tug. Steve is the recipient of a New York Times Best Illustrated Book Award, a Sendak Fellowship, an ILA Primary Fiction Award, and a Geisel Honor Award. His editorial illustrations have appeared in dozens of major newspapers and magazines including The New York Times, The Atlantic, The Washington Post, and The Wall Street Journal. He teaches at the School of Visual Arts in Manhattan and lives in Brooklyn with his wife and their daughter.