Improved reading and writing commonly occur from more reading and writing. But telling the reader about the contributions the author makes, with specific examples, is a useful feature of any review. Always maintain fairness and avoid intemperate personal comments. Readers and scholars alike will differ on many subjects and the way to handle them. In professional circles, authors are frequently given the opportunity to respond to reviewers, especially when the intellectual exchange has become heated and personal.
Critical book reviewing often includes a discussion of bias .
If you believe the author has demonstrated a biased position or viewpoint, it is proper to indicate this. But be sure what you see as bias does not reflect a bias of your own. If you have a bias, you must tell the reader, and in either of these situations, this level of analysis should not take much space. We seldom write or see perfect reviews. Yet it is probably the type of writing most students will do later in life.