Deathbeast

Eight time travelers journey into the Cretaceous period in this action-packed adventure from a Hugo and Nebula Award winner.
Six hunters and two official guides are going on the trip of their lifetime.
Their destination? Earth as it was a hundred million years ago, long before human dominion, when the great hot-blooded dinosaurs reigned supreme.
Each of the time travelers has a different motive. Some are on the strange safari for pay. Others are taking a holiday from civilization. There are women who wanted to show themselves the equal of men—and men out to test and prove their manhood.
But whatever their drives and desires, their strengths and weaknesses, the ultimate horror awaits them . . .