Jef Czekaj is a cartoonist, children's book author and illustrator, and musician. His comic, Grampa and Julie: Shark Hunters, ran in Nickelodeon magazine for more than ten years. Jef's other picture books include Cat Secrets and Dog Rules; Oink-a-Doodle-Moo; and Austin, Lost in America. He lives in Somerville, MA. You can visit him online at www.czekaj.com.