Should my parents let me read The Heroin Diaries?

I am obsessed with Nikki Sixx. He is my idol and I want to meet him so much. I have memorized most of Motley Crue’s songs and all of Sixx:A.M.‘s. I really want to read The Heroin Diaries, but my parents say it’s to graphic for a girl my age. Has anyone read it? Is it really that bad or could a 14 year old girl handle it? Be honest please!