Let the Right One In is a Swedish film about "Oscar, an overlooked and bullied boy who finds love and revenge through Eli, a beautiful but peculiar girl who turns out to be a vampire." And yes, it's based on a novel too.
Nicolas Cage stars in an end of the world movie. He has to solve some kind of riddle or it's bye-bye Earth. The plot kind of reminds me of "The Pattern" from Fringe.