The Vampire Diaries: The Fury and Dark Reunion by LJ Smith

I don't want to say too much about these two stories in the Vampire Diaries saga, as it might give away too much if you haven't read the first two books yet. The Fury picks up right where The Struggle left off, with everyone dealing with the fallout from the events of that book. Then Dark Reunion picks up several months after The Fury and is told mostly from Bonnie's point of view (one of Elena's best friends).

While The Fury fit in easily with the first two books of the series, Dark Reunion felt like an almost completely separate story, and is the only one with a time lapse in between. I felt like The Fury was the end of the interesting story; Dark Reunion just wasn't as good. However, if you've read the first book (or two books if you have separate volumes and not the combined version) I recommend reading this one as well, as The Fury ties up the loose ends from the first two.