Henry Fairfield Osborn - The Titanotheres of Ancient Wyoming, Dakota, and Nebraska (1929)
Archive.org direct link (volume 1)
Archive.org direct link (volume 2)
Open Library main page
Do we ever really leave behind a love of dinosaurs? And yes titanopheres weren't actually dinosaurs but they were very large prehistoric animals so our inner 8-year-olds won't make a distinction. This book is more technical than most of us will want but is nicely illustrated and even in a brief look shows how much work goes into this.
Henry Fairfield Osborn (1857-1935) was an early figure in the development of paleontology - he named the Tyrannosaurus rex and the Velociraptor among others. Some of his work apparently hasn't aged well since even his own biographer called him "a third-rate scientist". He became president of the American Museum of Natural History.