I'm reading the new (third) edition of Philosophy Goes to the Movies: An Introduction to Philosophy, by my colleague at the University of Newcastle, Christopher Falzon.
I'm biased to the extent that Chris is not only a colleague - he also comes across in my dealings with him as a smart, always pleasant, and disarmingly modest bloke. With that disclaimer out of the way, this book really is very good. It's impressively erudite, but written with a light touch. It would provide an excellent way to introduce an older teenager to philosophy (especially if he or she also had an interest in cinema), or it would make a great textbook for a foundational course in philosophy at college or university level.