You've just been transported back in time. Exotic plants tower above your head, while giant rat-like creatures scuttle around you. What concerns you most, however, are the meat-eating dinosaurs that are the size of a house! Do you think you have what it takes to survive the Cretaceous Period? Turn the pages to find out - only you can choose your fate in this interactive story!

Series statement from publisher's website.

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.

The reader's choices determine whether three friends will survive after being mysteriously transported back in time to when the climate was cold and saber-toothed cats and wooly mammoths roamed the land.

A secret mission to the Moon discovers a living Tyrannosaurus Rex trapped in an alternate timeline. As time begins to unravel once more, Nick Paulson, director of the Office of Security Science, finds a time passage to the Cretaceous period where humans, ripped from the comforts of the 21st century, are barely surviving in the past.

Cretaceous is the research-based, action-packed and heart-wrenching account of a young T-Rex who is separated from its parents and must navigate the dangerous world around it. When a Tyrannosaurus Rex is separated from its family unit, it embarks on a harrowing journey to reunite with them before the raw, real dangers of the Cretaceous Era separate them for good. This heart-wrenching story takes to the skies and dives into the sea—and explores everywhere in between—in this research-based, fictional account written and illustrated by Tadd Galusha (TMNT/Ghostbusters 2).