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Sapna - Showroom for books located in Bangalore - India.
http://www.sapnaonline.com/

Seaview Press - Self-published books, mostly from Australia and around the world. Includes details of the self-publishing process.
http://www.seaviewpress.com.au/

Student Book World - New textbooks in categories - or search.
http://www.studentbookworld.com/

Siso Books - Publishers of books related to religious, epics, computer, tales, dictionaries, grammar, classics; both in English and Malalyalam languages.
http://www.sisobooks.net/

Sands Publishing - Fiction and nonfiction books in most genres, including general, suspense, romance, mystery, sci-fi, children's, spiritual, and memoirs.
http://sandspublishing.com

Self Help Guides - Easy to use, and professionally written guides on many topics.
http://www.selfhelpguides.com/

Sacred Spaces - Selection of books and products related to a group of authors.
http://www.sacredspaces.org/

Sleeping Bear Press - Golf, children's, turfgrass management, health and nature.
http://www.sleepingbearpress.com/

Sociosights Press - Featuring "Katherine Stinson: The Flying Schoolgirl," a biography of an aviatrix.
http://www.sociosights.com/

Sunstone Press - General interest books as well as non-fiction books featuring the American Southwest.
http://www.sunstonepress.com

Substance Books - Links book sales to authors.
http://www.substancebooks.com/

Savage Press - Selection of books on a variety of subjects.
http://www.savpress.com/

Sam Weller's Zion Bookstore - New, used and rare titles. Includes a newsletter and regional picks.
http://www.samwellers.com/

Sidney T. Black Publishing, Inc. - Fiction and non-fiction by political activist David Truskoff. Includes biographical information about author.
http://users.erols.com/suttonbear/

Shakespeare and Company - Online bookstore selling books in all categories.
http://www.shakeandco.com

Stackpole Books - Publishing books on fly fishing, nature, outdoor sports, crafts and hobbies, history, civil war, and military reference since 1927.
http://www.stackpolebooks.com/

SeekBooks Australia - Large catalog by subject.
http://www.seekbooks.com.au/

Schiffer Books - Titles on antiques and collectibles, military collectibles and history.
http://www.schifferbooks.com/