Those sound like some informative reading Dave78.
A couple worthwhile books Davorp are The Harmony Illustrated Encyclopedia of Rock. First published in 1976, it is revised every few years. It's quite comprehensive.
Another is Blues-Rock Explosion (2001). An exhaustive, informative book with individual chapters devoted to a group or solo artist. I highly recommend it.
I love The Harmony Illustrated Encyclopedia of Rock! I lent mine to somebody and never got it back, and I missed it so much that I bought another copy. It's indispensable, IMO. And their book on jazz ain't bad either! (BTW Odysseus, I dig your Big Daddy Roth avatar - He was DA MAN!) Haven't seen 'Blues-Rock Explosion', will definitely order a copy soon.
I like Victor Bockris' books a lot. I've read 'Up-Tight: The Velvet Underground Story', 'Keith Richards: The Biography ', and 'Beat Punks', which were all written by him.
Let's see...I also really like Stanley Booth a lot. His book 'The True Adventures of the Rolling Stones' is a classic, probably the best book written on the Stones (aside form Bill Wyman's 'Stone Alone', that is).
I recently bought the Beatles Anthology book - boy, it's huge and chock full of fascinating quotes and photos. HIGHLY recommended.
If you're into 60's psychedelic and garage bands, the magazine 'Shindig' is excellent. It's a very high quality mag, and they cover a lot of obscure bands, with some very in depth articles and interviews. Its pretty hard to find though, I live in a big city and only know of one store that carries it. (they probably have a website though).
I read Hammer of the Gods a long time ago. Its a fun read, tends to focus on the sensational side of the Zep legend perhaps too much though. Looking forward to Keef's autobiography (which is supposed to come out later this year), it'll be interesting to see if he can actually remember anything!