Every book makes different demands on the reviewer. No single approach is right for all books. Consider as many points that seem pertinent, but remain responsive to the book under consideration.
Writing a book review is much like writing any other short essay. There is no universal formula, but following a few basic guidelines can simplify the task.
Review your notes and list the points you'd like to make.
Arrange those points in a logical order. Time spent now on organization not only produces a strong, clear structure, but also allows you to concentrate on phrasing during the writing of the first draft. One possible way of setting up the essay is like this:
Write the first draft, not stopping to fine tune the phrasing, but aiming to get onto the paper all that you have to say.
After some time has elapsed, read the draft critically, noting where it is ambiguous, incomplete, overwritten, etc.
Read the second draft, checking for errors in grammar and punctuation, and making sure that you have said just what you meant.
Type the final draft.
Proofread the typed copy, and correct as necessary to ensure that it is free from errors.