There are 3 books in The Vampire Diaries: The Return series.
The Vampire Diaries: The Return series does not have a new book coming out soon. The latest book, Midnight (Book 3), was published in March 2011.
The first book in The Vampire Diaries: The Return series, Nightfall, was published in February 2009.
The Vampire Diaries: The Return series primarily falls into the Horror genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.