Thru the years quilting techniques have changed so much and although many patterns have been adapted from template to strip and rotary cutting I found I gave away many books that I no longer used.
Many cities have quilt shows and lots of quilt books and years of Quilters Newsletters magazines etc. But knowing which books are good, meaning good directions and measurements that are true is difficult until one has some experience.
I don't know of any quilting book site
Half.com
ebay.com will show lists of new and used but you can specify.
Publishers may be the way to go and contact them. Depends on what you wish to do?
Good starter books, etc.?
Good Luck