This product was extensive and well thought out with some interesting and unique information. Homever, there are several grammatical and spelling errors that I noted on the first read though.
I would also have liked a rolling option that broke up the books by subject or genre. Understandably subject would have been more difficult, but the selection of books is already organized by genre.
I also expected the rolling table in the front as per usual for referneces of this sort but that wasn't really factor in not giving it five stars, just a comment.