These are ALL the books we used as reference for Dinosaur Study. This post contains affiliated links.
I highly recommend this book for preschoolers who love dinosaurs and letters at the same time. Mavi has been obsessed with the alphabet for years and he always always relates the alphabet to any object he sees.
These are specific books that describes dinosaurs according to characteristics. My son borrowed ALL of these books from the library.
Hope this post is helpful in giving you ideas on what books to use when studying dinosaurs.
Have a nice day!