Contains Multitudes

Brilliant, brutal, teen spec fic. Alien invasion stories are generally pretty great, and this was no exception. Also loved the David Cronenberg-style finish. Plus: apparently, we carry around 3lbs of bacteria in our gut anyway, and only 10% of our cells are “us” (and not bacteria), and these gut bacteria apparently affect moods, so... yeah, an “alien in your gut” premise doesn't seem so farfetched. (FWIW, there's an excellent bacteria essay in The Best American Science and Nature Writing 2011.)