This is a young adult book and a little dated, but I found it quite enjoyable! I learned quite a lot about the history of paleontology, and what I found most interesting was the ways ideas about dinosaurs developed (such as the realization that species become extinct, the idea that dinosaurs were actually quite evolutionarily successful, etc.). The book is organized around certain influential names in the history of paleontology, and I found their zeal for knowledge and dedication to science and adventure to be inspiring.