Completely blown away by the twists and turns in this, my advice is be careful of reading too many reviews in case you read spoilers.
Basically it's a teen read, that a lot of adults will love - 16 year old Min is trying to solve the mystery of her unusual life and occasional deaths. Beyond that is for you to discover for yourself.
Really excited about the next installment and if the film rights aren't snapped up, then I shall be very surprised.