Book reviews can help with your research, placing a book within a scholarly discourse or showing contemporary reaction to a work, and providing a convenient synopsis. The number of reviews published, their authors and where they appear will tell you a lot about the life of a book, its importance to a subject and the reactions to its publication.
Book reviews appear in newspapers, scholarly journals and popular magazines. To find appropriate reviews, you need to take into account the genre of the book (see below). When searching, remember that critical discussions of books are not always classified by databases as "book reviews," so search for the author and title of the book as well.