I ran across this link on another forum for the US Army Marksmanship Unit "Pistol Marksmanship Training Guide". This is a detailed 94-page booklet in pdf format that gets into some of the finer technical points of becoming a better shooter. I found it to be very interesting reading:
http://www.fortunecity.com/olympia/afl/801/amu.html
This is a zipped file that unzips to about 2.5 mb's.
http://www.fortunecity.com/olympia/afl/801/amu.html
This is a zipped file that unzips to about 2.5 mb's.