BIg fan of Bruce Emery's books, in particular his "Skeptical Guitarist" theory books.
For acutally learning some fingerstyle, I prefer Mark Hanson's two book/CD series,
"The Art of Contemporary Travis Picking";
http://www.accentonmusic.com/book_detail.asp?qID=5
and
"The Art of Solo Fingerpicking"
http://www.accentonmusic.com/book_detail.asp?qID=7
I have a whole library of music books, and these are the best I've come across for beginning/intermediate fingerstyle instrucion.
Very well written...starts off each section introducing a new technique/topic with some simple exercises, incorporates what you just learned into a song (and there are some very good songs here.)
By the time you get to the end of book 2, you are well on your way to finger/thumb independence.
Excellent tab, good tunes, laid out logically, good CD.
Great, inexpensive series.