Summary: "When a monster offers to help a boy who is afraid of numbers by doing his math homework, the boy eagerly signs a contract and agrees to pay later, but the first time he is asked to solve a problem in class and cannot, he realizes he has gotten no bargain."
This is one of the best children's picture books I've read lately and the illustrations are great! Even the illustrator has writing talent if he wrote his own summary for the illustrations on the CIP page. "The illustrations were produced by dipping a tranquilized squid into small vats of liquified, colored chalks and randomly applying him (or was it her?) to pencil sketches on carrot paper. Then hairbrushing."
