best manual for repair

[Lugnutz]

What is the best manual for working on my '87 GN? I have a moderate knowledge of auto mechanics and need a book to show me where everything is and how to work on it. What do you guys think? Price is not the main concern here. Wealth of information and the accuracy of that information are the most important thing. Where is a good place to find the suggested book?

 

[BlackBandit]

I like the factory service manual. I'm not sure if there's an aftermarket source for them but every once and a while one comes up used on one of the boards. I'm sure if there is an aftermarket source someone will post it.