Found via Researchbuzz , a database of books with photographs and photograph covers. Researchbuzz writes about :-
Covering Photography, a site that indexes book covers with photographs (as opposed to abstract book covers or those with paintings, illustrations, etc.) ......... The site contains hundreds of book covers with photographs, browsable by date, photographer (Laurie Anderson??), publisher, author, or designer.
The site can be found here. An excellent site for photo libraries.