Sandstone Books - Modern first editions of fiction books, from 1925 to the present. - http://www.sandstonebooks.co.uk/
Legends Fine and Rare Books - British and American collector quality modern first editions. Specializing in mysteries and thrillers. - http://www.legendsbooks.com
Nooks of Books - Graded first editions across a wide range of searchable categories, many signed. Online/offline search services. - http://www.nooksofbooks.com
Cromwell Books - Used and rare books in all conditions from reading copies to collectible first editions. - http://www.cromwellbooks.com/
Adam Smith Books - Selection of modern first editions. - http://www.adamsmithbooks.com/
Sawtooth Booksellers - Modern first editions of mysteries and fiction and modern literature, including many signed books and uncorrected proofs. - http://www.sawtoothbooks.com/home.php?pageName=Home%20Page
Gembrooks Books - Signed and unsigned modern first editions. - http://www.gembrooksbooks.com/
Babcock Books - Modern first editions of fiction, poetry, detective and science fiction with emphasis on signed books, notable writers and literary prizewinners. - http://www.babcockbooks.com/home.php?pageName=Home%20Page
Yesterday's Gallery - Fiction from the early 20th century, including mysteries, fantasy, westerns, and novels into film. - http://www.yesterdaysgallery.com/
Ken Hebenstreit, Bookseller - First editions of 20th century literature, fiction, mysteries, suspense and fantasy. - http://www.khbooks.com/
BMD Books - Modern first editions, mostly mystery, science fiction and fantasy. - http://www.bmdbooks.com/