G.B.
Go to the local full size library and talk to the children's librarian. She should have a book listing all kids books by topic and age. She will be able to give you a list of many many books to preview so you can decide which ones you feel the best about.
There are board books for kids as young as toddler/2 years old all the way up to graphic pre-teen books that show body parts and more information I want my little ones to have....