This page lists web pages for book dealers who can provide out-of-print and antiquarian material that publishers may not be able to supply. Of course, libraries are the most important resource for the literature of mathematics.

Abebooks [marketplace for 12000 booksellers] (online international)

Amazon (Seattle, WA USA)

Association of American University Presses (AAUP)

Australian Booksellers’ Association

Alta mathematica (France)

Barnes and Noble (USA and international)

B. & L. Rootenberg’s Fine and Rare Books (Sherman Oaks, CA, USA)

BookWire (from R.R. Bowker, New Providence, NJ USA)

Computerbücher am Obelisk (München, Germany)

Fachbuchhandlung Harri Deutsch

ILAB  – International League of Antiquarian Booksellers (the French website)
Internet Bookshop [W. H. Smith] (London, UK)

Le Monde en Tique (une librairie en informatique) (Paris, France)

Moe’s Books (Berkeley, CA USA)

Natural History Book Service (Devon, UK)

Powell’s Books (Portland, OR USA))

Stanford Book Store (Stanford, CA USA)

You can search for a book if you just know its ISBN at http://isbn.nu; in fact using a location of the form http://isbn.nu/1564924196 will automatically do a search for you (substitute the ISBN of the book you need), or http://isbn.nu/1564924196/price will get a price comparison for you at several sites. You can even use the UPC instead of the ISBN.