It has a fucking kick ass soundtrack and is written all by one person who performs the songs here and there still. I suggest reading the books for a better experience though. That's just a bit of him performing the songs he wrote on the soundtrack and a mix of his own band songs (band is Korn formed in 1993 still going until this day) I am seeing the guy live this May as he is starting up a solo project this year and I am expecting some songs from this too. Anyways I'd advise you check it out.