I've marked this as read today, though really it was finished months ago. I made my way through all of the old episodes of Classic Who via DVD, CD, and Audible [where appropriate] and as I went I read the entries for those episodes in this book. Often more than once, so I've probably read this a couple-three times over. It makes for an interesting extra bit of insight into each episode, with some plot notes, some big areas of continuity questions, and a lot of fun sub-bits like Fashion Victims, Double Entendres (a few stretching the term very hard [see what I did there?]), notable quotes, notable flubs and goofs, some inspirations, and links to other episodes. Each entry is only a page or two long, and generally only will make sense if you know the episode already, though technically there are spoilers galore.
It is the sort of thing that makes more sense in a pre-wiki world (and, in fact, many of the entries seem to be the seed of the equivalent tardis.wikia.com entry), but it still is a delight to thumb through if you want to trip down Classic Who Lane. Particularly when you get glimpses of the authors' preferences, with a love of the now too readily dismissed Seventh Doctor and a dismissal of some episodes considered by others to be classics. Doctor Who fans have gone through about as many changes as the show itself, and this makes a fascinating example of that.