(From the publisher):
The Time Warp Trio is back—and they're going back in time, all the way to the Stone Age, where there aren't any math problems. But there are plenty of other problems to keep Sam, Joe, and Fred on their toes, including a tribe of hostile cavewomen, a hungry-looking saber-toothed tiger, a bone-rattling earthquake, and a woolly mammoth who wants to turn them into toe-jam. But worst of all, how can The Book get them back home again when writing hasn't even been invented yet?
Original title: Your Mother Was a Neanderthal
Genre: Fiction→ Children & Young Adult→ Humorous Fiction
Fiction→ Children & Young Adult→ Fantasy→ Time Travel