In fact, like other genres of academic writing, such as journal articles and research proposals, academic book reviews tend to have a standard, even formulaic, structure. Although of course this may vary slightly by discipline and/or publication venue, my advice is, if in doubt, to use the following framework, with one paragraph for each of the following seven sections:
In thinking about the book review requirements for the journal, I took a gander at a number of scholarly sources that published book reviews. Here are some of the common technical requirements* for academic book reviews:
How to Publish an Academic Book Review | eHow
An academic book review is a formal paper that works to describe, analyze, and evaluate a particular source as well as to provide detailed evidence to support this analysis and evaluation. Further, a review often explains how the book compares to other works on similar topics or illuminates the contribution the book makes to our understanding of a historical topic.