Here’s a fun book that may not be in your library, since it seems hard to get a hold of: All Yesterdays: Unique and Speculative Views of Dinosaurs and Other Prehistoric Animals by John Conway, C.M. Kosemen, and Darren Naish.
In the brief introduction, the authors argue that the lack of soft tissue found along with skeletal fossils leads illustrators to depict the exteriors of animals as following closely along the bone structure. But, they note, the skeletons of living animals are “effectively invisible” because they are thickly surrounded by muscle, fat, hides, and hair or feathers.
The skeletons of modern birds– owls and parrots, for example– have long, slender neck skeletons, but overlying skin and thick feather coverings obscure these entirely.
So they present their artwork that follows anatomically faithful to the skeleton and then overlaid with speculation about the soft tissues and behavior (just how did male stegosaurus mount females for mating with all the back armor?). And, in a bit of professional self-criticism, the last section of the book includes drawings of living animals as if only partial skeleton fossils were known, showing just how far off our speculation about dinosaurs might be, illustrating two menacing dragon-like swans with their impossibly long necks spearing fish prey “with their long, scythe-like forelimbs.”
The light touch is what makes it an enjoyable, short book to peruse.