"Go Ask Alice" by Anonymous. I read this when I was 12, what an impact it made on the rest of my life.
Go Ask Alice is a controversial 1971 book about the life of a troubled teenage girl. The book continues its claim to be the actual diary of an anonymous teenage girl who became addicted to drugs. Beatrice Sparks is listed as the author of the book by the U.S. Copyright Office. The novel is presented as a testimony against drug use. The diarist's name is never given in the book.
"In the tradition of Go Ask Alice: Lucy in the Sky" Anonymous
Go Ask Alice - The first book I ever read in hours!