Hey Ed.
Prine is my favourite singer/songwriter. As Arkie mentions, above, Diamonds in the Rough is a fantastic album: his best, in my opinion.
The Prine Shrine is a great place to find out information about him. Or, if you want to listen to a good cross-section of his music, buy Great Days. It's a two CD set with a whole pile of his stuff on it, and a really good book of liner notes.
Paul.