An incredible collection of animal skulls that will show you what's really inside their heads!BONE COLLECTION: SKULLS is follow-up to the beautiful book BONE COLLECTION: ANIMALS. This spectacular collection of awesome skulls will take a closer look inside some of the world's most fascinating creatures. Learn what an animal's skull can tell us about how each creature lives. Discover the narwhal, the unicorn of the sea. Marvel at how a hippo's eyeballs nearly pop out of its head. Take a look at the rhinoceros' enormous beak. Featuring the skulls of pythons, piranhas, rams, bears and more, readers will be amazed by the wide variety of skulls in the animal kingdom.