I love Stephenie Meyer!
She is young, she is fresh and new with story lines that are completely different and alien, but human all at once.
"The Host" is a curious story of love and hate, "souls" and humans, both fighting for the simple existence that life is. But for Melanie and the "soul" Wanderer, existence is futile while they both incarnate the same body.
The fight between "souls" and the few remaining humans continue yet in one little corner of the Arizona desert love and the need to exists prevails. The humans wont give up. Yet the aliens just want to survive. By adopting the human body as a host, these "souls" posses the mind while the body remains intact.