Anyway, if you are a fan of the series the memoir adds enough extra material that you will find it interesting; it really explains things a lot more fully, and if you have not watched the series, it is really a fascinating read in the memoir genre. Very different from everything else out there. It was written in 2002. Ms Worth died a few years ago.
Easily picked up, in paperback, at Barnes and Nobles or you can borrow my copy.