Dinosaur Park — Hayford Peirce

In a far distant future, on a far distant world, human settlers raise dinosaurs for religious ceremonies. When 10-year-old Kerryl Ryson misbehaves, his father is fed to one of the sacred creatures. Plotting his revenge for 16 years, Kerryl thinks he can defeat his enemies with the help of a time machine--but first he must return from the dead.