LibraryThing saved the day! Michelle Tea's Rose of No Man's Land came up when I searched a tag mashup of coming of age, drugs, fiction. Prior to that, I had spent a long time trying to find a site on which I could search plot synopses or browse by BISAC codes. I also came across Whichbook, which was fun, but not fruitful. I read on the fiction_l listserv that FictionDB is good for finding books that are escaping you, but I couldn't access a lot of the site since I don't subscribe.
I was on the edge of giving up, but I'm glad I didn't. Now I want to find more books like it.