9 Best Science Fiction Novels For Young Adults Besides 'Mockingjay' (PHOTOS)

In case you haven't heard, "Mockingjay," the third and final installment in Suzanne Collins' super-smash "Hunger Games" series, hit bookstores this Tuesday. But long before Collins made a splash with her science-fiction trilogy, books like Lois Lowry's "The Giver" and Madeleine L'Engle's "A Wrinkle In Time" opened portals into strange and unusual worlds -- and raised chilling questions about life back here on earth.

So, in light of all of the "Mockingjay" buzz, we've compiled a list of the best science fiction for children. From satire to allegory, from post-apocalyptic worlds to utopias, and across place, time and space, the following nine novels should be required reading for any teenager.

Of course, there are classics of the science-fiction genre we had to leave out -- Huxley's "Brave New World," Herbert's "Dune," Asimov's "I, Robot," and Wells' "The Time Machine" -- but we carefully selected only those novels that seemed seminal for the young adult. In the end, what follows are the "9 Best Science Fiction Books For Young Adults Besides 'Mockingjay'."

Be sure to let us know: What would you put on the list?