Is there any one song you feel just fits the "mood" of your book? The one you could picture being at the ending credits or in a preview if it were adapted to film? Or that one that just gets you in the groove to write that piece and seems to connect you with it? I'd say What It's Like by Everlast fits with Rain When I Die perfectly as a main theme. I'd also throw in music from the Red Hot Chili Peppers, Alice In Chains, Nirvana, Puddle Of Mudd, Pearl Jam, and R.E.M. as well as classically composed music similar to this... And other stuff similar to Braveheart since the MC hails from Scotland.