Thunder Series by James F. David

When a freak natural phenomenon dissolves the boundaries between yesterday and today, the world is transformed into a patchwork mixture of the present and the distant past. Entire cities are replaced by primeval forests. Prehistoric monsters stalk modern city streets, hunting for human prey.While ordinary men and women struggle to survive in this strange new world, the president and his advisers search for a way to undo the catastrophe... moreWhen a freak natural phenomenon dissolves the boundaries between yesterday and today, the world is transformed into a patchwork mixture of the present and the distant past. Entire cities are replaced by primeval forests. Prehistoric monsters stalk modern city streets, hunting for human prey.While ordinary men and women struggle to survive in this strange new world, the president and his advisers search for a way to undo the catastrophe. But the solution may be more devastating than the dinosaurs.... less

Ten years ago, the prehistoric past collided with the present as time itself underwent a tremendous disruption, transporting huge swaths of the Cretaceous Period into the world of the twentieth century. Entire neighborhoods and cities were replaced by dense primeval jungles and modern humanity suddenly found itself sharing the earth with fierce dinosaurs. In the end, desperate measures were taken to halt the disruptions and the crisis appeared to be over.Until now... moreTen years ago, the prehistoric past collided with the present as time itself underwent a tremendous disruption, transporting huge swaths of the Cretaceous Period into the world of the twentieth century. Entire neighborhoods and cities were replaced by dense primeval jungles and modern humanity suddenly found itself sharing the earth with fierce dinosaurs. In the end, desperate measures were taken to halt the disruptions and the crisis appeared to be over.Until now.Slowly at first, but with increasing frequency, time begins to unravel once more. What's worse, Nick Paulson, Director of the newly-formed Office of Security Science, discovers that the time displacements are being manipulated by unknown parties, utilizing a mysterious new technology. Indeed, the very integrity of the space-time continuum appears to be at risk.To preserve both the future and the past, Nick and his allies must uncover the secrets hidden within in a lost temple at the center of a dino-infested jungle-and in an enigmatic structure on the surface of the moon. But they are not alone in their quest. A cult of ruthless fanatics is also intent on controlling the time waves, and they will stop at nothing to reshape history to their own design . . . . less

Eighteen years ago, the prehistoric past collided with the present as time itself underwent a tremendous disruption, transporting huge swaths of the Cretaceous period into the twentieth century. Neighborhoods, towns, and cities were replaced by dense primeval jungles and modern humanity suddenly found itself sharing the world with fierce dinosaurs. In the end, desperate measures were taken to halt the disruptions and the crisis appeared to be over.Until now... moreEighteen years ago, the prehistoric past collided with the present as time itself underwent a tremendous disruption, transporting huge swaths of the Cretaceous period into the twentieth century. Neighborhoods, towns, and cities were replaced by dense primeval jungles and modern humanity suddenly found itself sharing the world with fierce dinosaurs. In the end, desperate measures were taken to halt the disruptions and the crisis appeared to be over.Until now.New dinosaurs begin to appear, rampaging through cities. 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 twenty-first century, are barely surviving in the past. Led by a cultlike religious leader, these survivors are at war with another sentient species descended from dinosaurs.As the asteroid that ends the reign of dinosaurs rushes toward Earth, Nick and his allies must survive a war between species and save the future as we know it.Dinosaur Thunder is a terrifying, futuristic thriller in the tradition of Michael Crichton and Douglas Preston. less