John R. Horner Book order (chronological)

Dinosaurs Under the Big Sky describes the different species of dinosaurs known to have lived in Montana and explains the scientific importance of their bones and skeletons. Photographs and hundreds of pen-and-ink drawings depict the dinosaur fossils that collectors are most likely to find under Montana's Big Sky.

Describes the discovery and excavation of the world's only complete Tyrannosaurus fossil in Montana, and what was learned from it.