My Mother-In-Law got me this book 4 Christmas a couple years ago...and i love her 4 it...check it out here
oh, and then there's this...
Part 2
Part 3
"This introduces the consideration of the spiritual value of music, called in a unique way to infuse hope into the human soul, so marked and sometimes injured by it's earthly condition. There is a mysterious and profound relationship between music and hope, between song and eternal life..." - Pope Benedict XVI 4.24.08