Essential microtonal reading

Lots of books have been recommended here, by folks with good,
intelligent opinions...I would imagine that it wouldn't hurt to read all
of them, if one had the time. What I haven't seen in many books on
tuning/theory, is the connection of these issues to a broader picture,
the integration of tuning/music into, shall we say, more spiritual
concepts. In Indian music, for example, being a musician is recognized
as a path to the Creator, a way to achieve inner realization. I believe
that Pythagoras did not separate his musical teachings from his
spiritual teachings, and as has been stated here before, many cultures
around the world see music/sound as a basic component of the Universal
structure. Of course, numbers and their mystical significance are a
basic part of most all world religious views, from the ancient Jewish
teachings to the Chinese to the Masons. Thus,
music/tunings/math/mysticism (for lack of a better word) are rather
closely tied together; but, in many books on tuning, we don't get much
talk about the more intuitive side of things. That's why Danielou's
"Music and the Power of Sound" is one of my favorite reads on the
subject; he does connect the issue of music/tuning to a much bigger
framework, and rightly so. I just picked up another book that leans that
direction, by Dane Rudhyar: "The Magic of Tone and the Art of Music;"
but, I've just begun to glance at it, so cannot comment in depth yet. I
would like to see more emphasis placed on the spiritual component of
music (and all art), because in the long run, it's the depth of feeling
in a piece of music that
makes it what it is. And, I believe that the study of tunings, and their
deeper meanings, can add a lot to a composer's ability to create
profound and meaningful art. When, of course, that study is combined
with strong compositional skills, and a gift for shaping those tunings
into great works of art...Hstick