Donald C. Rizzo has done an excellent job in making this book. If you never took A&P in college, and you want to learn the subject on your own for whatever reason, this is the book to start with, hands down. It does exactly what the title implies; it covers the fundamentals without a lot of wordiness, making the material easier to retain. My point: you definitely learn the subject, and fast! The book is so easy to read, its like a novel. I simply couldn't put it down. By following the mantra to independent study and learning (repetition, repetition, repetition), I believe I am as competent in the subject as anyone who took one year of A&P (as far as the fundamentals go), due to the fact that the text is straightforward, concise, and well written. I haven't found a recognizable mistake in the text yet. I also recommend buying the study guide, which helps retention.
However, I consider this book a primer, because other textbooks I've examined, such as Thibodeau and Patton's "Anatomy & Physiology (5th)," and John W. Hole Jr.'s "Essentials of Human Anatomy & Physiology (6th)," explain the material in somewhat greater detail, with more to learn. But so do the A&P books used in medical school courses. The bottom line is this: once you have gotten the fundamentals from Rizzo's book stabilized in your memory, you can step up to the larger, more detailed texts, not just the two mentioned above, but even the texts used in medical school. That is what makes Rizzo's book an excellent primer to the subject.