Wow! This book has it all.
It starts from where the other Vampire Diaries book series finished. Elena (who has become a bit of an otherworldly spirit) and Stefan are happily together and Damon is really jealous of Stefan because he wants Elena.
Then the story goes away from the plot of the TV show. Basically, one night while driving through the woods Matt, Bonnie, and Meredith hit a tree. From that tree comes an evil force known as the "Shinichi" or fox spirits. These spirits are Japanese and they take over the human body and soul.
Because Damon is jealous of seeing Elena so in love with Stefan, he plots to capture Stefan and take his place in Elena's heart. He uses the fox spirits to do this. Meanwhile Bonnie develops feelings for Damon, although these aren't really explored in this book.
The fox spirits take over the town of Fells Church, turning people into monsters and demons who eat their own flesh. The story sounds pretty horrific but it's not that bad to read. I don't like horror at all and I could read it quite easily. There are also funny moments - like Damon calling Matt Mutt and Gnat because he doesn't like him.
The end of the story was a bit of a blur as lots of things happened at once. What I remember though is that Elena and Damon have to find Stefan and free him to eliminate the fox demons (I assume that's what the next 2 books will be about.
Overall I give this book a 4.5 stars because it was much more gripping and action packed than the last Vampire Diaries books. It didn't quite get 5 stars because some of the scenes I would have liked to have seen more from and there were a few spelling mistakes in the writing. But I do look forward to reading The Return: Shadow Souls to see what happens next.