Countdown
Mira Grant's Countdown is a novella rather than a proper novel. It's really short. Short enough that I had no problem reading it on my phone. Grant wrote it as a prequel to Feed , and released it in the month leading up to Feed 's sequel, Deadline . Countdown is a prequel, detailing the events that led to the zombie apocalypse and setting the stage for Feed. Countdown relies pretty heavily on dramatic irony. If you've read Feed , you know exactly how and when the zombie rising happens. You're passingly familiar with many of these characters and already know their fates. I think Grant does a good job of using that to ramp up the tension in this book. If you enjoyed Feed (which you should definitely read), give Countdown a try. My only complaint is that it's only available as an e-book (hence my reading it on my phone). I can't put it on my shelf with the rest of the series.