Sites for Science Fiction and other genre books reviews. If you are looking for a specific book, here is your answer.

Aboriginal SF: Reviews
Offers a monthly update, very ab-original!

Asmiov's Science Fiction: On Books
All that's new in  Science Fiction is here presented monthly, while rants, raves and fascination can be found in Norman Spinard's guest columns.

Award Winners Review
The site which contains descriptive information about the winners of the various awards, starting from the Classics and reaching to the current awards.

The Book Engine
Everyone can leave reviews and read reviews here. Very nice.

Event Horizon: Reviews
This is a webzine created by the former owners of Omni. Very interesting.

Fantasy Finders
Actually Swedish, but translated i English, this is a site of fan's reviews.

NESFA Member Reviews
A list of reviews form the members of the NESFA club.

Postviews
An archive of selected book reviews posted online.

Rec.arts.sf.reviews
Usenet here: reviews, and news, and chats.

SF Chronicicle's Reviews
A professional site, with posted reviews on Sci Fi and Fantasy.

SF Site Reviews
A very well organized site with great reviews on classic and contemporary books. Check it out.

Steven Silver's Reviews
The site includes not only reviews on various books, but also indications of what awards each books was nominated for, what awards it won etc.

Tangent Online
A webzine dedicated to  20th century fiction.

The Taylers' Speculative Fiction List
Howard Tayler provides a series of reviews on Science Fiction and Fantasy, listed according to author.