Your Mother Was a Neanderthal #4

In this thrilling audiobook, Joe, Sam, and Fred find themselves transported to the Stone Age, where they encounter a variety of challenges, including hostile cavewomen, a saber-toothed tiger, an earthquake, and a woolly mammoth intent on causing chaos. As they navigate this prehistoric world, they realize that writing is nonexistent, posing a significant obstacle in their quest to return home. Will they find a way back with The Book's help, or will they be stuck in the past forever?