The Stephan Grossman books have always been some of the best guides to fingerpicking, and his empire has now extended to production of audio and video tapes and disks to supplement the printed material. He has his own website ~ if "StephenGrossman.com" doesn't work, just google his name and you'll find it.

Happy Traum's books also date back to the 60's and are similarly excellent; Happy was also one of the first to supplement his books with tapes. His publisher, Oak Publications, is a great source for all kinds of folk-music-related insructional materials and other stuff.

One really excellent and fairly obscure fingerpicking songbook that I highly recommend is Donald Garwood's "Masters of Intrumental Blues Guitar" (another Oak Publication). I don't know anything about Mr. Garwood, or indeed if he has any other books to his credit, but this one is top-notch.

He goes into great detail on a half-dozen or so songs from each of three of four notable artists. I concentrated most of my effort of the Mississippi John Hurt section, wherein I learned some astounding riffs which make it sound like I'm playing twice as many notes as I'm actually hitting ~ tricky little bits I hadn't found in any other book, and which I could never have analyzed and reconstructed on my own just from listening.

PS to Chris in Wheaton:

Isn't "I'm Satisfied" fun to play? All those MJH songs are so great ~ at first it may be a bit challenging to get one down, then for a while it becomes deceptively simple to play, but in the end you find yourself playing something just a little bit different every time around, and that's when you're just beginning to polish things up and really learn to play the song.

I've been practicing/playing "Let the Mermaids Flirt with Me" for about a year now, almost every time I pick up the guitar and almost to the exclusion of the rest of my repertoire, and still haven't exhausted the possibilities, still don't feel that I have it "down pat."