After moviemakers flocked to her doorstep to buy the rights of her Twilight series, Stephenie Meyer realised that her fan base could extend to adults as well, and therefore wrote The Host. This time, however, she set the youngsters of the story in the future, establishing her credentials as a sci-fi romance author, and, inevitably, a movie version of her book was announced.
So somewhere in the future, Earth has been taken over by peaceful, parasitic aliens. These entities think that human beings do not deserve this rich planet, since they do not know how to preserve it. These al....