Michael Crichton, the #1 New York Times bestselling author of Jurassic Park, returns to the world of paleontology in this recently discovered novel-a thrilling adventure set in the Wild West during the golden age of fossil hunting.

The year is 1876. Warring Indian tribes still populate America's western territories even as lawless gold-rush towns begin to mark the landscape. In much of the country it is still illegal to espouse evolution. Against this backdrop two monomaniacal paleon ...