Dinosaur Warriors

With the timestream destroyed, Aaron Cofield and his friends find themselves marooned in a constantly shifting past. Their only hope for rescue lies in Eckels, the deranged time traveler who caused the destruction. Pursued by intelligent dinosaurs, hunted by Spanish Concuistadors, they must forge a fragile alliance among all of the timestorm's victims if they are to survive... now that the dinosaurs' prey includes man.