I'd buy a book full of big pictures of dinosaur bones, especially ones I'd seen personally. Haven't seen books like that, so I take my own pictures. Conditions for that can be difficult!
Closeup and extreme-perspective shots could be like easter eggs (can you find them?), or just be big fun pretty pictures. Abstract photography is not so bad.
Most fossils are plates-- flattened, not fully dug out. Less opportunity for shot discovery, but imagine a book of all the things they don't have space to display, or that are not charismatic megafauna.