Historical
Uchronia: The Alternate History List
Highlights novels that start with a known point of history and explore other paths history might have taken. What if Napoleon had escaped and gone to America? What if the British had won the American Revolutionary War?
Mystery
Mystery Readers InternationalMRI is the largest mystery fan/reader organization in the world, is open to all readers, fans, critics, editors, publishers, and writers.
Romance
All About RomanceLots of goodies here for the romance-lover: reviews (including the best “Desert Island” picks), discussion groups, parodies, contests and more. Cast your vote for the best and worst book covers!
Science Fiction and Fantasy
Locus OnlineThe online version of the monthly magazine that gives “news, reviews, resources and perspectives” on the world of science fiction. Packed with material for the SF reader including interviews and short reviews of hundreds of books from years past.
Science Fiction and Fantasy World
This highly interactive site invites users to submit reviews, articles and stories. It also offers reviews of books, stories, TV shows and movies, book excerpts and links to author sites.
Westerns
Western Writers of AmericaThe official web site of the Western Writers of America. Read Roundup magazine, find author contacts and information about the Spur Award and lists of winning works.
Roundup Magazine
The online (and somewhat reduced in content) edition of Roundup Magazine, published by the Western Writers of America. Includes reviews of western novels as well as information about publishing westerns