I was skeptical when this series first began, but as a long time fan of the author, I decided to try her YA series. Not only is this series different from most YA novels (for one example to that, the romance is not a present love story, but a past one. The main character Emma already lost her love) it brings a lot of solid issues about life to the table.
In Grave, Emma and her friends (and I still love the fact Michael is included!) are preparing for their next step in the fight against the Queen of the Dead. Allison's brother is lying in a hospital fighting for his life, and that strain, that fear of loss, is not ignored. Michelle Sagara is an expert at making her character's feel real with emotions.
Chase hates Emma throughout most of the series, not seeing her for who she is, but merely what she is. Something that can be applied in many different aspects of life.
Emma's still dealing with the loss of Nathan, and the fact he's not completely lost to her both because of her gift, and because of the Queen's power.
We get more of a back story on the Queen - who she was, and why she suddenly became what she did, and how she and Eric are connected.
The conclusion is bittersweet. Without adding in spoilers, the conclusion allows everyone some measure of peace, but it's not the picture perfect (or story perfect) peace some readers might seek. It's realistic feeling, it still involves losses, but there are silver linings through out.
Again, I wasn't certain I'd like this series - most YA books are not my cup of tea. But this series is, and I greatly enjoyed following it through to the conclusion.