A hilarious book for new dads and their little loved ones to share and enjoy! It's bedtime for Dada's little cave baby. But Baba wants a bedtime story, and not just from any book. Baba wants just the right book-and the right book means the biggest book! Poor Dada! The delaying tactics of his Stone Age darling may not speed up bedtime . . . but they just might change the course of human history.