Andy Briggs & Steve Horvath 
DinoCorps [EPUB ebook] 

Entombed for millennia, a team of combat dinosaurs is accidentally reanimated by 14-year-old Carl Heyward. While trying to keep them a secret, Carl discovers the evil Saurons have survived too. Responsible for the last mass extinction event, they’re planning to eradicate the human mammalian vermin with another extinction event. The race is on to save the planet… again. World shaking action-adventure in this all-ages story!