Cobblestone Books  
   Specialties include science fiction, fantasy, horror, mystery, and pulps. Catalog is updated weekly.
   http://www.cobblestonebooks.com/

Cheap Thrills  
   Used, rare and collectible books. Focuses on reading copies of mystery, intrigue, and romance. Order by email.
   http://www.book-seekers.com/

Nora's Book Nook  
   Offers fantasy, mystery and romance used books. Order by email.
   http://www.norasnook.com/

Book Orphanage  
   Includes autographed first edition mysteries, author photos, and signatures.
   http://www.book-orphanage.com/

Blkpearl Used Books  
   Sells used books of all genres. Will buy, sell and trade. Order by email.
   http://members.tripod.com/blkpearl19/index.htm

Vintage Library  
   Books and information on authors from the early 20th century and the pulp fiction era.
   http://www.vintagelibrary.com/

Violet Books  
   Specializes in hard to find antiquarian supernatural literature. Site covers a fairly broad range of late 19th and early 20th century fantasy literature.
   http://www.violetbooks.com/

Aaben Books  
   Specializes in fiction, mystery, science fiction, poetry, drama, and first editions.
   http://www.aabenbooks.com/

Signed Editions  
   Signed and inscribed books, plus a selection by local New England authors.
   http://www.signededitions.net/

Pywrit Used Books  
   Specializes in science fiction, fantasy, horror, and romance fiction paperbacks.
   http://www.pywrit.com/

Nina's Used Books  
   Categories include romance, mystery, science fiction, and fantasy. Both paperback and hard cover books.
   http://www.ninasusedbooks.com/

Christine Kovach, Bookseller  
   Catalog of modern first edition science fiction, fantasy, horror, and mystery titles. Many signed books.
   http://www.kovachbooks.com/

The Book Cave  
   Dedicated to the sale of secondhand books, annuals, comics and magazines. Find Enid Blyton, bestsellers, Commando comics, The Muppets, and Dr Who. Order by email.
   http://www.thebookcave.com/

Book Lady Used Books  
   Specializes in gently used paperback, hardcover, and audio books. Order by email.
   http://bookladybooks.com

Bargain Books Plus  
   Sellers of "Box of Books", a box full of random titles in romance, mystery, suspense, science fiction, horror, thriller, nonfiction, reference, and children's books.
   http://www.bargainbooksplus.com

Bernard R Nielsen Collection  
   Offers private collection of antiquarian books, modern first editions, fine bindings, illustrated children's books, rare and out of print books, crime fiction, travel, exploration and nature books, photography albums, rare prints and manuscripts.
   http://www.bernardrnielsencollection.com

Gnu Books  
   Includes general fiction, romance, science fiction, horror, mystery, spy and adventure, and children categories. Both paperback and hard cover books.
   http://www.gnubooks.net

Grace's Romantic Reading  
   Used novels, including fantasy, historical, horror, mysteries, and romance paperbacks.
   http://www.romanticreading.com/

Grampian Used Books  
   Used books of romance, teenage, and other fiction. Order by email.
   http://grampianusedbooks.tripod.com

Books Maps Prints More  
   Offers used, out of print, and fine books on a variety of subjects. Sells decorative collectible and antiquarian prints, maps, ephemera, magazines, and catalogs.
   http://www.booksmaps.com

El Pinarillo Books  
   Internet-only bookstore which buys, sells, and searches for quality secondhand books. Located in Spain.
   http://www.elpinarillobooks.com

Book'M Used Books  
   Includes rare, out of print, hardcover, paperback, fiction, nonfiction, and children's books.
   http://www.book-m.com

Aziomedia  
   Includes titles from all genres, first editions, and ephemera. All books are cleaned and covered.
   http://www.aziomedia.com

Shelby's Book Shelf  
   All books are listed in alphabetical order by author's last name. Romance books are listed by series number. Tarot cards and New Age books also offered.
   http://www.shelbycity.com/shelbysbookshelf/index.htm

Bondi Books  
   Offers a visual book catalog. Located in Japan and ships worldwide. Order by email.
   http://www.bondibooks.com

Laurie J Books  
   Features gently used paperback and audio books. Most books have scanned cover images.
   http://www.lauriejbooks.com

Booger Holler Book Barn  
   Used books from all genres including textbooks. Specializes in "The Agatha Christie Mystery Collection" with full sets as well as individual volumes.
   http://www.Booger-Holler-Book-Barn.com

ACIS Books  
   Singapore-based store offers new and used books for rental and purchase. Delivery is within Singapore only.
   http://www.acisbooks.com

Pazzo Books  
   Carries selection of used books with particular strengths in 20th century fiction, children's, and the social sciences.
   http://www.pazzobooks.com

Book-Bin  
   Specializes in used books and videos. Has rare books as well as current releases.
   http://www.book-bin.com

Fiction Addiction  
   Sells used fiction of all flavors, including science fiction and fantasy, horror, mysteries and thrillers, children's and young adult, romance, contemporary fiction, paperbacks, hardcovers, audiobooks, and collectibles.
   http://www.fiction-addiction.com/

Journey Books  
   Carries selections in genre fiction such as science fiction, fantasy, and mystery. Also publishes science fiction, fantasy, and American Journeys magazine.
   http://www.journeybooksonline.com/

The Book Rack  
   Larger selections in religious, mystery, spy, adventure, detective, fiction, and history.
   http://www.kensbookrack.com/

O'Briens Book Cellar  
   Rare, hard to find, childrens, hardcover, and collectible books. Large collection of copyright-free, public domain ebooks.
   http://www.obrienbooks.com/index.html

Now and Then Books  
   Sells used fiction of all genres, including science fiction, fantasy, horror, mysteries, thrillers, children's, young adult, romance, and contemporary fiction.
   http://nowandthenbooks.com

Peepz-Shopz  
   Offers paperbacks of popular fiction, mysteries, and romance. Also has selection of food, cookbook, recipes, biographies, autobiographies, self-help and advice.
   http://www.peepz-shopz.com