This is my favourite book out of the series.
We follow a girl Clary that finds she is no normal human and is pulled into a hidden world of shadow hunters and demons together with a sprinkle of werewolf and vampire.
The way Cassandra writes makes me green with envy. Switching between action and real emotion has you totally hook feeling the pain and loss the characters feel. Through all her books she has a thread that always brings you to the water which in the end is very important in deed. I don't know how she does it.