Sherrilyn Kenyon

I've only read two books so far.

1. Whispered Lies
2. Silent Truth

To be honest, I started with the last installment in the B.A.D. series and I am trying to read from the last one, to the first. However, it doesn't complicate things concerning understanding the main plot of the Series. It's kind of like you get thrown into a story and with every book you read you get more information why things are like they are in the last book.
It's a very complex plot and I should warn you. It's a book for adults, so you have content which is both concerning sexuel intercourse and torture.
Some weeks ago the next installment got released, finally, which I won't read until I have read the books which were released before silent truth.

Update:

3. Born to be BAD (One BAD Night; BAD to the Bone & Captivated by you)
4. Phantom of the Night

Both books are very good and I will write a review about it!

5. BAD Attitude (I'm currently reading this book)