I don't know of a particular site that just sells quilting books like you describe. I'm like those who have already posted. I've gotten books at discounts from LQS (some LQS offer discount cards after you have bought so much at their shop), Amazon (new and used), Joann's, clearance at any store that had clearance craft books, Book Fairs such as the Green Valley Bookfair off Interstate 81 in Virginia, library sales, discount and used book stores, etc...I like your idea though, let us know as I will definitely check it out:)