Charge of the Triceratops (Dinosaur Cove Series #2) by Rex Stone, Mike Spoor
A new series for dino-loving adventurers!
Tom and Jamie can't believe their luck when they find a secret entrance to a prehistoric world filled with dinosaurs!
The boys return to the dinosaur world looking for adventure. But they get a little more than they bargained for when a herd of triceratops charges right through their lunch! It looks like there's only one way to avoid getting squashed: they'll have to hitch a ride on a dinosaur.