Hiya six,
To a degree the answer to your question depends on your existing knowledge and your mechanical background.
Bentley is, by far and away, the best technical resource you'll find. But it does assume that you have knowledge and tools which you may not.
On the other hand, Clymer approaches the subject assuming that you know nothing. This is definitely the manual for the person just getting into VWs. The problem is that Clymer is out of print. However it does show up at resellers.
Haynes has the uniqueness of being the only shop manual not entirely distilled from original VW publications. As such I find it an excellent adjunct to the Bentley.
Muir's "Idiot Book" is a wonderful read, but not exactly designed as a shop manual. Complicating the issue is that some of the information in Muir is just plain wrong. Take anything in this manual (and there is some very good stuff in there also) with a grain of salt.