I can help you find a good book in pretty much any category. I don't know too much about Sci-fi but I do have friends that are very much into those types of books, so I may be able to recommend some. Other than that, I can help you find pretty much any kind of book you are looking for.
I have been reading since before I was in school. I own many books and have read every one.
I am a college student now, but still know a bit about good books for teens.