The year is 1876. Warring Indian tribes still populate America’s western territories even as lawless gold-rush towns begin to mark the landscape. While the civilized East debates Mr. Darwin’s heretical new theory called evolution, two monomaniacal paleontologists pillage the Wild West, hunting for dinosaur fossils, while surveilling, deceiving and sabotaging each other in a rivalry that will come to be known as the Bone Wars. Into this treacherous territory plunges the arrogant and entitled William Johnson, a Yale student with more privilege than sense. Determined to survive a summer in the west to win a bet against his arch-rival, William has joined world-renowned paleontologist Othniel Charles Marsh on his latest expedition. But when the paranoid and secretive Marsh becomes convinced that William is spying for his nemesis, Edwin Drinker Cope, he abandons him in Cheyenne, Wyoming, a locus of crime and vice. His honor at stake, William joins forces with Cope and soon stumbles up