As the textbook author, I am interested in both positive and negative reviews. (As the website author, I may or may not post negative reviews, but I plan to state so if I do not.)
Anonymous feedback is not permitted. You will have to log in to google. By filling this out, you also are giving me the permission to distribute your comments on this and other website as testimonials (or warnings!) to other potential readers.
Please provide a fair review. Do not let any personal conflict of interest taint your review. Honesty and integrity are paramount.