I have read a few of these reviews, and have to say that although I agree with some of the points made by other readers, about how this book 'borrows' from Harry Potter and Twilight, I think it is unfair to assume that this makes House of Night bad. All vampire stories have to have certain common denominators, and I think that the Casts have covered this well.
The main character, Zoey Redbird, has a certain vulnerability about her that I found quite endearing. She has been Marked as a vampire fledgling, an event that no teenager ever wants to experience, and her life has to change dramatically, everything she's ever known comes to an end and her life takes a completely different path.
As an adult, I must admit to being a little shocked at first by some of the 'not very PG' scenes in the book....after all, it is found in the teen section of the bookshop!! I think parents should judge for themselves, before permitting or denying their teens these books. Although there are scenes of a sexual nature, they are not gratituous, or graphic in any way, and if your teen is on the mature side, I don't see that they would have a problem with the content.
On the whole, I have rated this book 5 stars, although really I am rating the whole series so far. I have read all the available episodes, and am now waiting with bated breath until the next installment is available.