In A Book Review. See the Syllabus . There are various types of book reviews. Some are quite short, other long enough to be considered essays. Some are really reports, rather than reviews, and might even appear as a short summary of a book.
Some reviews require no specific form and only demand that certain matters be addressed in it.
On the other hand, some guidelines for reviewing are tightly structured and can even set forth a purpose for each paragraph. Since they are intended for student reviews, they also have a pedagogical intent. It might be to elaborate on a topic covered in a general manner in class. It might be to serve as a supplemental assignment in the course. If that is the case, it may go beyond anything covered in the class.