Andrea Zimmerman is the author of many beloved series including Trashy Town and Smashy Town , illustrated by Dan Yaccarino; the bestselling truck series Bulldozer Friends, Digger Man, Fire Engine Man , and Train Man; All Buckled Up and All Dressed Up ; and Dig! illustrated by Marc Rosenthal. Andrea grew up in Ohio, Utah, New York, and California. She enjoys gardening, going for walks, and visiting museums. Dan Yaccarino is an author-illustrator who has been named in the Texas Bluebonnet list for The Fantastic Undersea Life of Jacques Cousteau , Kirkus' Best Children's Book List for All the Way to America , The New York Times 10 Best Illustrated List, and the Bologna Ragazzi for Every Friday. His picture book I Am a Story is a Junior Library Guild Selection and a Chicago Public Library Best Book of 2016. He's also the creator and producer of several animated series based on his books, Doug Unplugs (AppleTV), Oswald (Nickelodeon), Willa's Wild Life (NBC and Qubo), as well as the character designer behind The Backyardigans (Nickelodeon).