The reader's choices determine whether two classmates will survive after being mysteriously transported back in time to when exotic plants towered overhead and giant rat-like creatures scuttled on the ground.

The reader's choices determine whether three friends will survive after being mysteriously transported back in time to when huge insects swarmed the skies and fearsome dinosaurs ruled.

The reader's choices determine whether three friends will survive after being mysteriously transported back in time to the Neolithic Era, when humans were first learning to farm and harvest and to domesticate animals.

A young Tyrannosaurus rex with very poor eyesight loses his eyeglasses, resulting in chaos for himself and the creatures around him.

"What happens when a couple of prehistoric creatures want to become internet stars? Trilobite and Amber (a walking whale) dream of fame and fortune. They don’t realize that most of the world thinks that they’re extinct. When a wandering paleo-newscaster introduces them to the world of internet videos, they hop at the chance to get behind the camera. The competition for internet fame will be fierce—Trilobite and Amber will face off against ancient...

Surprises are in store as Stink excavates his backyard in search of a relic from an extinct beast -- and Judy lends him a little sleight of hand. Mega-chomp! Stink wants to make the find of the century. He's on a dig, dig, digging quest in his backyard to find a tooth from a saber-toothed cat, otherwise known as a Smilodon. Why not? Two kids in Michigan found a mastodon bone in a backyard stream, and a girl in Great Britain found a pterosaur bone....