I always find it quite fascinating to read books about socialism and communism that were published before the break up of the Soviet Union. Then, the analysis is so much better, in my opinion. I couldn't really begin to explain why this is (I'm sure Karl Marx must have an answer somewhere), but I suppose an author writing about living, breathing socialism (albeit of a warped kind) is much better than some of the dross that has come about since official communism died at the beginning of the 1990s.
Anyway, at the moment the book I'm reading on the loo is The Marxists by C Wright Mills. Some have described Wright as a libertarian socialist, but I'm not so sure. I know very little about him, so if anyone else does - or has read any his books, I'd be interested to find out more.