Tom Sullivan is an author, illustrator, and graphic designer based in Boston, Massachusetts. He studied at the New England Institute of Art where he earned a Bachelor's degree in Graphic Design.

After spending the first ten years of his career as a freelance Art Director and Designer, Tom switched gears to pursue his love of storytelling. He is the author and illustrator of the Balzer + Bray/HarperCollins picture books I Used To Be A Fish, BLUE vs. YELLOW, Out There and the graphic novel series Unsolved Case Files.