Bøger i Aliens vs. Dinosaurs serien

THE WORLD OF THE DINOSAUR - 65 million years ago. Aliens visit the earth and collect small specimens for laboratory study, not realizing they are kidnapping children. In an effort to get them back, King Rex forges an alliance with the aliens who hold the secret to flying without wings. Without their help there is no hope of traveling to their home world and getting the children back. Roughstone, a renegade general, has built his own army to take control of the empire. His opportunity will come when the King leaves on his rescue mission. Rex is not the only one who has made an alliance with the aliens. Roughstone has his own force of greenies that have developed powerful weapons to support the General in his coup. Together they will take over the earth to do with as they please. Will Rex see through the General's plan in time to save his empire?