Ireta Adventure, The

Omnibus edition of two novels, each originally published separately in paperback: Dinosaur Planet, and Dinosaur Planet Survivors.

Hot, humid, geologically unstable, Ireta was, nonetheless, rich in radioactive minerals. And so, the Exploratory and Evaluation Corps had dispatched a team to determine the extent of the planet's wealth.
The team had its hands full in the primitive wilderness - where alien life forms interacted with creatures identical to the dinosaurs of prehistoric Earth. . . where volcanic and tectonic activity had produced geological mysteries. . .and where team leaders Kai and Varian found disturbing evidence that Ireta had been previously explored, though the EEC had neglected to mention it.
Kai and Varian were grateful for the heavy-worlders on their team. Born on high-gravity planets, conditioned to harsh environments, heavy-worlders had superior strength and size - invaluable on Ireta. But their physical differences set heavy-worlders apart psychologically as well - a fact that would have dire consequences for the Ireta expedition...