I am not a Doctor, however my friend is and he willed this book to me after he passed away. He said it was his "go to" book in Med School. I was given the ninth edition and it has helped me to get alot of good comments fom my Clinical Instructors on my Patho Window's. The cellular level information that is required by the Instructors on these Patho Window's does not seem to be available in the books they sell us prior to Nursing School. Now I know why my friend who started out as a Nurse then became a Doctor told me I would need this book. It has been a tremendous help and has been getting me all A's in clinical, so far. When I get a job I will be buying the newer edition.