Neanderthal siblings Lucy and Andy are back to their paleo pranks. This time, they have to put up with more than just each other---the cave is feeling awfully cramped since the humans moved in.

"Lucy and her goofball brother Andy, two Neanderthal siblings living 40,000 years ago, take on a wandering baby sibling, bossy teens, cave paintings, and a mammoth hunt. But what will happen when they encounter a group of humans? Includes a special paleontologist section that helps to dispel common Neanderthal myths"--