Dragon teeth Michael Crichton

1876. Warring Indian tribes still populate America's western territories even as lawless gold-rush towns begin to mark the landscape. Against this backdrop two paleontologists pillage the Wild West for dinosaur fossils, while deceiving and sabotaging each other in a rivalry that will come to be known as the Bone Wars. Into this treacherous territory plunges William Johnson, a Yale student with more privilege than sense. Alongside Edwin Drinker Cope, the famed adventurer, he stumbles upon a momentous discovery -- dragon teeth of a fantastic size! But to keep this treasure safe William must first confront some of the West's most dangerous and notorious characters.