Jef Czekaj is a cartoonist, children's book author and illustrator, and musician.

He was born the year that people first walked on the moon and the year that Sesame Street first appeared on TV. This explains a lot.

His comic, Grampa and Julie: Shark Hunters, ran in Nickelodeon Magazine for more than 10 years. A collection of the first three years of the comic was published with the help of a Xeric Foundation Grant and distributed by Top Shelf.

Jef has illustrated several books for Charlesbridge Pulishing with two more on the way. His first book with Hyperion, Hip and Hop Don't Stop, will be published in 2010.

He DJs for an award-winning hip group under an assumed name.

Jef lives and works in Somerville, MA.