My girlfriend got me this as a present, and I'd seen it on Amazon few times and thought "Maybe not...", as I thought it probably wouldn't tell me anything I didn't already know.
I was mostly right, but partially wrong; there's a lot a things that anyone with a passing interest in classic horror will already know, but there's a lot of stuff that I didn't know or had forgotten. I'd never heard of 'The Walking Dead', but I now intend to see it ASAP.
I'm not sure how useful the detailed biogrophies of the crew are unless you're a serious student of film (which I'm not), and I skipped most of these. It's nice to read something by someone who's enthusiastic about these films, but sometimes a bit of reigning in might have been better. The 'another prespective' are not that intersesting as they're not long enough and seem to be written by people who are intesrested in film purely as entertainment (nothing wrong with that, but it would have been better to have someone with an interset in films of this period, but not this particular genre; or vice versa).
The trivia sections are diverting, but the 'Goofs' are pointless. Do I need to know about continuity errors unless they really effect your enjoyment of the film? Well, no I don't.
Still it made me want to see 'Jekyll and Hyde' and 'Dr X' again.
I'm still not sure who this is aimed at, but if you're going on a long train journey, and you have are interest in this period of horror films, but aren't a sad fan-boy you could do worse.