you never know just what you have till you start cataloging it.
I found a nice little program called the Alexandria book collection manager. I didn't realize I had 33 books on woodworking, and I still have a 1/2 shelf to go, 17 on gardening. Still have all the wifes cook books, and sewing books to go and few more on gardening. and who knows what else. Pretty slick little program, enter the isbn number and it retrieves the book cover(if available) publisher, author and date.