I have downloaded and printed off several e-books and although the printing is tedious I find it less expensive than actually getting the book (if even still available).
I have some really great antique/vintage pattern/quilt history type e books that you wouldn't be able to find if it weren't for this type of service. If you were the price would be cost prohibitive. Most of the things I've found in the past just aren't available any other way. I just make a notebook for the book and it works for me.