Image via Wikipedia I stayed up past my bedtime finishing this engrossing novel by Stephenie Meyer, author of the acclaimed "Twilight" YA books. The Host is published as her first "adult" as opposed to YA novel, but there's nothing especially adult about it except the age of the protagonists. The story is a riff on the SF classics "Invasion of the Body Snatchers" and "The Puppetmasters", but told from the alien invaders' POV: Why would humanity object to having their bodies taken over by aliens, when the aliens are peaceful, and non-violent and loving? The "souls", as they term themselves, don't understand it, until one "soul", Wanderer, finds itself sharing a body with its host, Melanie--something that's not supposed to happen. Melanie's thoughts and fears and dreams intrude into Wanderer's life until the "soul" decides to do something about it. From a SF POV the worldbuilding raised some...