I love this series! I read books 4 and 5 back to back, and have the 6th one coming to me - hopefully it will be here soon!
Lover Revealed (Black Dagger Brotherhood, Book 4) by J.R. Ward
This book in the series features Butch, the human who was a cop that just learned way too much about the vampires and the black dagger brotherhood. Now he lives and fights with them. Still, he feels like an outsider. Especially since he's in love with Marissa - a vampire female who (he believes) does not want anything to do with him.
Lots of surprises in this one, especially about Butch, who has far more to him than meets the eye!!
Lover Unbound (Black Dagger Brotherhood, Book 5) by J.R. Ward
Next up is Vishous's story. After a particularly bad fight, he is rushed to a human hospital because of a bullet wound - and meets Jane. He immediately connects with her, which causes all sorts of problems! We also learn about his childhood, the abuse he suffered at his father's hands, and with him, we find out who his mother is.
While the relationship between him and Jane is good, the far more interesting parts of this book deal with his relationship with his mother and with Butch. I wasn't really happy with the way the book dealt with him and Jane, but hopefully during the next book it will become a bit more palatable.