AbeBooks is a great resource for older and out of print books. Amazon itself is completely overrun with trash-quality fly-by-night POD and counterfeit publisher

AbeBooks is a great resource for older and out of print books. Amazon itself is completely overrun with trash-quality fly-by-night POD and counterfeit publishers. Even when you do find a legitimate copy, it's often ludicrously overpriced. I buy a lot of antiquarian books, many of which are not just out of print, but in the public domain. YMMV.