"The story of cat Jacob Tibbs, runt of the litter, and his exploits on the high seas as a ship's mouser"--Provided by publisher. Interest Level: 3-6 Reading Level: 6.1 ATOS Book Level: 6.1 AR Interest Level: MG AR Points: 11 AR Quiz: 179589EN Lexile Measure: 1020 Fountas & Pinnell: U.