I have checked a bunch of sites to answer this question, and I am pretty confident that the answer is March 16, 2010.
If you mean the fourth VOLUME it would be called "THE RETURN: SHADOW SOULS" and it has already been released.
The next book "The return: Shadow Souls" will come out on the March 15, 2011. And I know for a fact that after those two, there are at least THREE more!! You can read more on L.J. Smith's website. :)
The originally trilogy came out in 1991 and pressure from the fans convinced LJ Smith to write a fourth one, which was relased a year later. She has a new trilogy out called 'The Return' and so far 'Nightfall' and 'Shadow Souls' have been released, with the last book, 'Midnight', due out in July.
It is out
if you are talking about shadow souls then it came out in march and u can pick it up at a book store or do what i did find a walmart that sells it. i got it for 12.96 hardback at walmart. ENJOY!
Vampire Diaries will be returning April 7th in the United States.
now
Season three of the vampire diaries comes to netflix in fall 2012!
January 21st
It doesn't
Already out (:
March 25th