This is certainly one of the cleverest zombie stories I've read. There's much more going on in Dead Lock than I expected, and if you're looking for something in the zombie genre that's a little different then this is definitely worth picking up.
Set in an alternate England controlled by a 1984-style government the story feels like a horror, thriller and dystopian drama all at once, the genres blending together seamlessly. Most of the scenes takes place in the grounds of a prison as inmates face off against hordes of undead in order to win freedom, so there's plenty of zombie action, but also enough ominous hints and references for the reader to easily picture the threatening outside world these characters also live in. It all makes for a very effective atmosphere.
Scenes which flash back to different times can sometimes feel distracting but in this story they're well written, fit in naturally and make for interesting plot additions. There are a lot of twists and turns, surprises and enjoyable moments of dark comedy. Great fun to read