<human>: Give me the gist of the text in a nutshell

My girlfriend grew up homeschooled and I took her last month to the Museum of Natural History for her first time. I didn't even think of it as she stood silently in front of the skeletons of the prehistoric beasts. She was in awe, and had a million questions I couldn't answer. She can't wrap her head around how they find, date, reconstruct etc!

There was a book in the store that explained how the dinosaurs were dated,  and how we know about what their skin was like. I can't remember the name of the book though...

But I am open to suggestions! She is an excellent reader and I'd like to get this for her for valentines day. She had the same look as all the knee high grasshoppers around her.
<bot>: I need a book that answers all the questions someone (adult) who's never even thought of the existence of such a creature might have.