Companion is book 1 of a trilogy, so don't get real upset when Companion ends. Companion will have closure. Corruption, the second book of the trilogy, will be a direct follow on from Companion. It will be written as if it were a standalone book. Bad guys get Companions in Corruption. Not the best thing that could have happened. Fusion, the third book, is where it will get interesting. The extraterrestrials come to rescue any survivors from the crash. They are no more impressed with mankind than Al was, except Al had better manners, maybe because he had to survive. So, who's the good guy and who's the bad guy again? I'm sure they'll sort it out, but how will it change mankind?