Professor Valksnitch is a Russian scientist who invented the prehistoric portal. One day, three kids named Zach, Cody, and Kate found the secret facility where the portal is. They get caught and Professor Valksnitch has plans for them. Will they survive the harsh and painful environment of the Jurassic period? Read this book and find out.

Riley has a gift. She has the ability to talk to animals. Riley has known this for quite a while, and she uses it for the good of the town. But when a scientist shows up and takes Riley to the past, her whole world is turned upside down, shaken quite a bit, and tossed on a bed of nails. She finds out that not only she can talk to animals, but she can also talk to dinosaurs! Not all dinosaurs are good, though...