This is a great book showing the lineage of birds within Coelusaurian theropods. The first 27 pages are broken into 9 "chapters", each of which highlights some aspect of bird evolution from other theropod dinosaurs. The bulk of the book is devoted to describing roughly 80 species of theropod - coelusaurs, tyrannosaurs, ornithomimosaurs, ornitholestes, compsognathids, and then the Maniraptorans (Therinzosaurs, Oviraptorosaurids, Alvarezsaurids, Roodontids, Dromaeosaurids, and Avians). Every 2 pages is taken up by a large photo with 2 paragraphs: 1 on the history of the fossil and species, and 1 as an artist's note about why they made the choices they did. I learned a lot from this small bit of text - the role of color in actively helping an animal survive, how the shape of jaws/teeth/beaks can lead to inferences about diet, family behavior, etc.