by Mickey Rapkin, author of the forthcoming "Pitch Perfect" (and the recent NY Times article).

http://pitchperfect-thebook.blogspot.com/

Just started, but some good reading so far.

20 versions of Apologize? Oof. Mia Culpa (the Harmonics version is mine, but I had the good sense to mix out the Timbaland "hey hey hey" yawp and take it in a different direction).