Very textualised book on a imagined future where the human race are primates and the angels of Heaven are being invaded by the Humen, a cyborg race of humans.
It sounds dodgy but really, its is very good for reading.
jodi picoult; the pact
Julie Bertagna; the opposite of chocolate
Ann Brashares; the sisterhood of the travelling pants (not really a suicide/addiction book, but a good teen read)
Blue is for Nightmares was really good, also try Go Ask Alice, it's not a series but it's a diary of a teen that gets addicted to drugs, I loved that book and always will lol
I enjoyed the Blue is for Nightmares series.
http://search.barnesandnoble.com/The-Blue-is-for-Nightmares-Collection/Laurie-Faria-Stolarz/e/9780738709888/?itm=2