I got "How to Get a PhD" on my first week, read three pages and never opened it again. Then, by the end of the first year, while working on my upgrade report, I made the mistake of buying "How to write a Literature Review". I read two pages and instantly thought "20 quid down the drain". Then, at the end of my third year, in a moment of panic, I bought "Authoring a PhD", and I think it's crap.
Well, everyone's different, but in my view these works are only good if you find any consolation in self-help books.
For me, this very forum had been way more helpful.