Remembering back to the books that I enjoyed as a teenager I recommend:
ANYTHING by Robert Heinlein, pre or post-1960. Especially The Moon is a Harsh Mistress, Starship Troopers, Glory Road, The Puppet Masters, and all of what are commonly considered to be his juvenile series (written about high school age kids) as well as Podkayne of Mars. Many of my favorites were among his later works, but they may not appeal (yet) to a teenager.
Phillip Jose Farmer's Riverworld series.
The Lord of the Rings as well as The Hobbit by J.R.R. Tolkien. NOT the movies. The BOOKS.
Isaac Asimov's Foundation; Robot; and Galactic Empire series. He wrote a great many short stories that are worth reading as well.
Harlan Ellison wrote a heck of a lot short stories (and a couple of Star Trek scripts) but two that stayed with me were Repent Harlequin, said the Tick-Tock Man and The Cheese Stands Alone.
I'll leave the old stuff now before I fill a page.
Amongst newer works I'll suggest:
The Harry Potter series. One of the few works that grabbed not only my not-yet-ten-year-old daughter's attention, but her parent's and most of her parent's friends as well.
The Percy Jackson series. My daughter and wife like the whole thing and the newer Egyptian series too. I've been wanting to pick them up myself.
Between the oldest stuff and the newer I liked:
Systemic Shock by Dean Ing. It's actually a trilogy but the first book stands alone just fine.
All of the Ringworld series by Larry Niven. In fact most anything Niven wrote.
Pretty much anything by Jerry Pournelle, but especially the stories he wrote with Niven. In particular Lucifer's Hammer, The Mote in God's Eye, Oath of Fealty, and Inferno.
For lighter reading I really like Glen Cook's "Garett, P.I." series.
Tim Powers has written some really interesting, somewhat strange, stuff. I recommend The Drawing of the Dark and Dinner at Deviant's Palace.
David Brin has the Uplift series consisting of Sundiver, Startide Rising, and The Uplift War. I also highly recommend his novel The Postman. Again, the book, not the movie.
That should keep you more busy until you're no longer a teenager!