Homicidal aliens and other disappointments

Jesse has had the worst year of his life. First a race of homicidal (but very polite) aliens invaded Earth, killing pretty much everyone and enslaving the few people left behind. Now Jesse is revered as some sort of Chosen One all because he managed to kill one of the alien lords and escape -- even though he's not really sure how he did it. But it's hard to argue with the multitude of new talents he is developing, including (somehow) killing aliens with his mind and grasping glimpses of alternate futures. With thousands of aliens already on Earth and thirty million more about to arrive, Jesse has to decide whether to embrace his maybe-destiny before the world is completely destroyed.