Book reviews are an analysis of or commentary on a particular book or books or even a series of books. Book bloggers may review all genres or just specific ones, such as romance, science fiction or even graphic novels.
The popularity of book reviews also reflects changing times. Book reviews were long the almost exclusive province of weekly, biweekly or other periodic print publications. As book blogs increased, debate began about the value of blogs as a medium for and source of book reviews. Now, however, some stand-alone print book reviews are being downsized or shut down. The blogosphere may be the future for book reviews.