*Final Diagnosis* refers back to *Star Surgeon*, which pleased me because that the first Sector General book I ever read [in 1967 or 1968, when paperbacks were only 50 cents]. If you've read that earlier book you'll enjoy reading how things turned out, and you should enjoy the book even if you haven't. Although, as another reviewer mentioned, it's easy to figure out most of what's going on (once Hewlitt remembers his kitten's accident, the incident with Morredeth is inevitable, etc.), that doesn't matter much. Never mind the "mystery", the book is worth reading for the characters alone. I only wish, for new readers' sake, that series remained in print as long now as they did when I was a girl. The internet makes it easier to find out-of-print books than it used to be, but that's no substitute for being able to order all the earlier books from the publisher. Ann E. Nichols