The legendary "jazz" guitarist Ted Greene passed away last month at his home in California. I had never personally met the man but I had the good fortune to come across his one and only album, "Solo Guitar," when I was in high school (many years ago). The album is now being re-released on CD and I highly recommend it to anyone with an interest in solo guitar, jazz, and harmony.
The CD has about 45 minutes of tunes played solo on a Telecaster. Ted Greene is by far one of the most harmonically-advanced guitarists that I have ever heard. He is a master of painting a wash of colors using unusual voicings, harmonics, and multiple lines. The clarity of his lines (often three or four at a time) was what immediately struck me when I first heard his album.
Ted also has a few books published, of which I am familiar with the following:
Chord Chemistry
This is a massive compendium of chord voicings and introduces some of Ted's harmonic concepts, including the dreaded 17th chord!
Jazz Guitar Single Note Soloing
Includes an extensive analysis of melody and concepts for improvisation. I believe there are a couple of volumes.
Modern Chord Progressions
Similar to Chord Chemistry above but much more broad in its treatment of the subject of harmony.
I know there are some guitarists on this forum and I hope that those who have never heard of Ted Greene will at least give the CD a listen. There is also a tribute page with links to get the CD:
http://www.tedgreene.blogspot.com/