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.