2 stars (This is not the paperback edition of the textbook) - This book appears from amazon.com to be simply the paperback edition of the regular textbook, but it is not. Ordering this will get you a paperback "Study Guide" instead. The book is misrepresented or not clearly labeled on this site, and I suppose the phrase "5th sg" is supposed to be enough for us to tell what it is. Don't order this thinking that you will get a paperback edition of the textbook. 3 stars (Don't confuse the hardcover with the paperback) - One problem (maybe I'm just stupid): don't confuse the hardcover, which is the actual textbook itself, with the softcover, which is the supplemental answer key/review book. I bought the softcover thinking it was a cheaper, more flexible version of the 912 page text, which is cumbersome, and it's not. Maybe I'm just a lightweight at purchasing textbooks online. BB 5 stars (excellent text) - The text material is superbly organized and illustrated with great models, comprehensive tables, and wonderful photographs. It is a thorough work and, although not easy reading, explained about as clearly and completely as humanly possible. P.S. The review above does not seem to pertain to this book, but to a teacher's manual? ... Brooks Cole :: Science & Human Physiology :: Science&Mathematics :: Science :: Physiological Processes :: Life Sciences - Human Anatomy & Physiology :: Life Sciences - General :: Human Physiology - From Cells to Systems (with CD-ROM and InfoTrac)