Identify the major theme of the book. Most of the subject matter within the book will be centered on this major theme, whether it's one event in history or a time period full of different events.
Specify what type of book is being reviewed. The book might be an investigative piece that delves into unanswered questions and speculates on the answers. It might also be a book that is written in story form, but based on actual events in history.
Note the author's reasons for writing the book, if it is stated in the book. A writer will often indicate a reason within the writer's note, located either at the front of the book or the back of the book.
State whether or not the author agrees with the things that other people have said about the subject matter within the book.
Point out evidence that supports the subject matter of the book.
Criticize any parts of the book that you find unsatisfactory. Point out things that you would have added to the book or things that you would have done differently to improve the subject matter.
Talk about what you find satisfactory within the book. If any specific page or chapter was put together exceptionally well, then specify what you enjoyed about it.
Give an opinion about whether the author succeeded in writing a good, factual book. Give a reason for your opinion. Use quoted examples within the book to support your opinion.