After being more or less strung along for the previous eight books, it is nice to see Eric and Sookie's relationship finally taking shape in Dead and Gone. That was one of my favorite things about this book.
Book 9 of the Sookie Stackhouse books is also interesting because it is the first book where the fairies, another group of others that was introduced a few books earlier, play a major role. In fact, this book is more about Sookie's connection to the fairies than almost anything else.
This book is also kind of a turning point in the series. All along, Charlaine Harris is kept Sookie's narrative voice funny and irreverent, which I loved because it is so unusual in the vampire genre. Think Twilight, Interview with the Vampire, etc. — angst is kind of the norm for these books.
But this book changes in a way. Sookie doesn't completely lose her narrative voice, but the feel of this book is a lot darker than the earlier novels. Even though Sookie's irreverence is one of the things I love about these books, I think the shift in this novel is appropriate, when you consider how involved Sookie was getting in the supe world!