For the very early stages, we used P.D. Eastman and Dr. Seuss books, as well as the Step Into Reading Series (they're a mixed bag, but some are pretty good). My son's real breakthrough book was "Big Dog, Little Dog". One of my favorite silly early readers by Dr. Seuss, under his backwards pseudonym T. Lesieg, is "In a People House". There are others too, like the original Little Bear book by Sendak.
One thing that I wish we had done is get an early reader's dictionary. You might look into that, to encourage her to read more on her own.
