All the mammoths have fled Old Mouse City! It's a total cat-astrophe! Not only because mammoths are valuable allies of the cavemice, but also because without them, the cavemice can't make mammoth milkshakes, their delicious national drink. Geronimo Stiltonoot must embark on a daring journey to find the mammoths...and avoid going extinct before he gets back!

A research companion to the Magic Tree House story "Dark Day in the Deep Sea," providing facts about sea creatures and the history of underwater exploration.

Provides facts about eighteen prehistoric animals from the Stone Age and describes how humans lived alongside them.

This is the story of 10-year-old Henry, who has moved with his mother (his father died when he was small) to a snowy mountain town where it has been hard to make friends. Making matters worse is a concussion he sustained when bullies collapsed a snow tunnel onto him. When Henry finds an injured prehistoric short-faced bear, he names him Yarp and, in secret, nurses him back to health.

"Hushpuppy [is] a tenacious six-year-old force of nature in an isolated bayou community. When her tough but loving father Wink ... succumbs to a mysterious malady, the fierce and determined girl bravely sets out on a journey to save him. But Hushpuppy's quest is hindered by a "busted" universe that melts the ice caps and unleashes an army of prehistoric beasts"--Container insert.