J.otto Seibold has illustrated, and in some cases also written, 15 books for children, including Olive, the Other Reindeer; Penguin Dreams; and the Mr. Lunch books. He lives in San Francisco.

Siobhan Vivian once raced electric go-karts with J.otto Seibold, and thankfully, neither of them was seriously injured. Her first novel for young adults came out in March 2008. She lives in Brooklyn, New York.