One quick thought...ask your local libraries to "hold" the quilt books for you when (or if) they ever pull them from circulation. A lot of libraries will remove titles from their collections if they have not been borrowed in "X" number of years. I have my name into 3 or 4 local libraries for their discarded books. Some libraries will give them for free, others will sell them. Ask me how I know this....I used to volunteer at one of the local libraries (no, not the one where I bought the quilt books for $1 each).
Anita