My books are arranged by subject. I like to be able to find a given pattern at any time. So I have made a index on my computer in excel. I have listed every quilt pattern, that I have. First I did each pattern, the book, and the page. I did this for all the books. I also have binders with sleeves in them. I did the same for each of them. Now if I want to make a pineapple quilt I type in pineapple pattern and excell tells me that I have 6 difference places that I can find the pattern, in which book, or binder and the page. It takes time to organize this data but is well worth the effort, as you just look at 6 different quilts all in the same pattern and get ideas real easy.