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A. A. Wilson - English and American Literature, Modern First Editions, Reference, and Military History.
www.geocities.com/advalorem_uk/

A.B.Normal Books - Modern 1st edition and limited edition science fiction, fantasy, horror, related young adult and reference books.
www.abnormalbooks.com/

ABookLegacy - Mostly out of print non-fiction books; Americana, genealogy, history, military, and general subjects.
www.abooklegacy.com/

Adams Used Books - Second-hand cross stitch patterns, books, and magazines including hard to find and out-of-print.
www.adamsusedbooks.net/

Adrian Harrington - Specialising in literature, modern first editions and bound library sets; fine and rare books in all fields. Based in London, UK.
www.harringtonbooks.co.uk/

Alfearare Rare Books - Specializing in rare books, incunabula, manuscripts, old maps and printings; biligual, English and Italian.
www.alfeararebooks.com/

Alibris - Used, hard-to-find, and new books.
www.alibris.com/

All Vintage Bookstore - Online bookstore of vintage and collectable books. Specialties include children's books.
allvintagebookstore.0catch.com/

Alsworth Book Corner - Used and out-of-print books.
www.geocities.com/r_alsworth/abcornerhome.html

Ambrosia Books - Antiquarian and out of print books, specialist in biography, Australian history, women's interest, crime fiction and juvenile.
www.users.bigpond.com/ambrosia/

Anasazi Books - Used and collectible books. Romance and other fiction.
anasazibooks.tripod.com/

And Books Too - Used books; searchable and categorised.
andbookstoo.com/

Anglophile Books - Secondhand books; specializing in British women authors, books for Anglophiles, and Women's studies and history. Also offers a book search.
www.anglophilebooks.net/

Antic Hay Books - Used, rare and first edition fiction, poetry, drama and autographs.
www.antichay.com/

Antiquariaat Colombine - Titles on Amsterdam, art, philosophy; also in Dutch.
www.colombine.demon.nl/

Antiquariaat Vanhove - Used and antiquarian academic books.
www.antiquariaat-vanhove.com/index_en.asp

Antiquarian Books's Cyberstore - A database holding the stock of a selected number of dealers; buy and sell antiquarian books.
www.rarebooks.ch/

Antiquarian Bookstore - Used, out-of-print, rare, and antiquarian books.
www.antiquarianbookstore.com/

The Antiquarian Shop - Specializing in rare and unusual antiquarian books, maps, and autographs in every field of interest.
theantiquarianshop.com/

Antiquariat Daniel Good - Offers rare books, prints, engravings, and maps. Includes owner's profile.
www.danielgood.ch/

Antiquariat Turszynski - Rare and valuable books from 16th to 19th century. Much of the site is in German, but English translation available for those areas.
www.turszynski.de/

Anton W. van Bekhoven - Books on art, architecture, art history bibliography and typography, history, philosophy, Middle Ages. Includes book lists and request form.
www.antonbooks.com/

Any Amount Of Books - Rare books, first editions, modern literature, art, poetry, scholarly/academic books, antiquarian, leather bound sets, general stock.
www.anyamountofbooks.com/

Arca Books - Hard to find, out of print, used, and rare books on a variety of topics.
www.arcabooks.com/

Argonaut Book Shop - California history and the American West. Other specialties include Pacific voyages, art, and Western private press books.
www.argonautbookshop.com/

Asher Rare Books - Rare books and atlases, specialties include travel and botany.
www.asherbooks.com/

AstroLogos Books - Reprints of hard-to-find and out-of-print books; facsimile editions of original titles in hardcover or softcover format.
www.astrologos.org/

Attic Books - Used and out-of-print books. Search by author, title or keyword.
www.atticbooks.net/

Atticus - Used books and music.
www.atticusbooks.com/

Augustine Funnell Books - Collectible books and magazines, including mystery, horror, nonfiction, fiction, children's, Canadian.
www.gusbooks.com/

Aussie Books - Australian books and out-of-print books, sorted by category and searchable.
www.aussiebooks.com.au/

Authors & Artists - Specializing in modern firsts, signed and limited editions, authors' early works, earth sciences, Native American, mythology and antiquarian. Includes company profile.
www.aaabooks.com/

Azorabooks - Out-of-print book service specialising in new naturalists and natural history titles. Includes signed editions.
www.azorabooks.co.uk