Essentially summarizing the book and adding a paragraph or so on at the end discussing who might find the book useful and interesting. You may also sprinkle some light commentary/critique throughout the summary.
The main points may include:
Why is this important to society? How can it help build a better society? How does it help us understand people and/or society?
Main Criteria:
Does it accurately summarize the main points of the book, critically analyze the book material and, thoughtfully reflect on how the material from the book might be applied to or play a role in your life or society overall, addressing specifics?
I’ve included an example of a book review that reflects how this one should be.