Book reviews typically evaluate recently-written works. They offer a brief description of the text’s key points and often provide a short appraisal of the strengths and weaknesses of the work.
Readers sometimes confuse book reviews with book reports, but the two are not identical. Book reports commonly describe what happens in a work; their focus is primarily on giving an account of the major plot, characters, and/or main idea of the work. Most often, book reports are a K-12 assignment and range from 250 to 500 words. If you are looking to write a book report, please see the OWL resource, Writing a Book Report.
By contrast, book reviews are most often a college assignment, but they also appear in many professional works: magazines, newspapers, and academic journals. They typically range from 500-750 words, but may be longer or shorter. A book review gives readers a sneak peek at what a book is like, whether or not the reviewer enjoyed it, and details on purchasing the book.