Thought the novel starts off a little too saccharine and childish, it certainly picks up towards the end. There's quite a bit going on in this novel and it's nice to see the characters maturing.
One of my favourite aspects of the House of Night series is the wonderful interaction between the friends. It's so nice to see a core group of kids really depending on each other and working together. Which makes it all the bittersweet when that trust and closeness is threatened in Chosen. I definitely see it as an integral part of Zoey's growth, but you can't help but feel bad about the situation.
I was really surprised about the issue of Zoey's virginity. It's hard to review or talk about without giving away too much detail... but suffice it to say you really want to give the girl a talking to. I really liked that the Casts broached the subject, rather than circling around it or writing themselve into some corner. They faced it head on, didn't gloss over it, and didn't string us along for many more books. I really look forward to seeing how the authors (and Zoey) handle all of this in the next stories.
The Hosue of Night world is also evolving and there are some great insights to future revelations. It looks like everything is not as it seems and we may begin to discover that either the adult vampires aren't sharing all their information, or maybe they don't even know everything about their kind. Quite interesting and it makes me like this universe all the more.