Ayn Rand books question?

How old should you be to read and comprehend books like The Fountainhead and Atlas Shrugged. Im not really sure what objectisim or however u spell it is but i wouldnt mind reading these books. I just want to know if ill comprehend them. Im 16 going on 17 this year, Im pretty smart, Im even doing a dual enrollment program my junior year (this coming school year) where i will be taking some college classes as well as highschool classes. So what do you think?