Im not sure why this was rated so high, I have read many zombie type books, and this just wasnt that good. The idea that the light kept them away was fun, there were plenty of ideas for that, but the author didn't go very far.
The main problem I had was that for the first half of the book, I had no idea who was who. It was very confusing until around the middle of the book.
If I had known who was who, im sure it might have been a better book, but it wasn't that great. It was a okay book, not the best, not the worst. But, an okay book.