When posting your own review in the comments below, consider including the following questions. You may even want to label your answers (1-5) for easier studying:
1. What is the thesis/argument of the book?
2. How does the author support his/her thesis (including their methodology)?
3. How does it fit in the historiography (similarities & differences from past works)?
4. What were its strengths and weaknesses?
5. Any additional applicable comments?
You are welcome to write reviews for as long as you desire, though it may be worth trying to answer these questions in 1-2 sentences each. That way, later when looking through all of your comments (and those of others), it’s easier to review for your comprehensive exam.