Method books, teaching tools

Annotate: make recommendations for things you have experience with.

Neil Haverstick books (anyone use them?)
Joe Maneri 72-tone book (anyone?)
Brian McLaren Introduction to Microtonality CD, DVDs (anyone?)
W.A. Mathieu: The Harmonic Experience (a friend of mine swears by it)
David Doty: Just Intonation Primer
any Ivor Darreg in particular?
Jacob Barton ThirtyOneToneSinginCamp (distance learning anyone?)
Kyle Gann's Just Intonation Explained (nice website)
Jim Alteri's JI calculator (good for tuning up)
Partch, Genesis of a Music
Hayden Chisholm's microtonal (quarter-tone) saxophone etudes
Although not a book, Carl Lumma's "Too-Condensed Tuning Math Outline" is an excellent resource for the beginner (speaking from personal experience)

Reference Books