I startedreading this to see if it was suitable for my daughter, but decided she was probably a bit young for it. Nevertheles, I continued through the tale. Although "Star" became "Starr" a couple of times the proof reading wasn't too bad. I just didn't like the characters. Also the story reads as the start to the sequel. Edge of Mercy stands alone, but there is an obvious follow on. The cause of the zombie plague isn't given, but could be in the next book. I don't know. I doubt if I'll continue with this series. SciFi zombies (or "Draghouls") a better in Boneshaker or similar.