N.Y. The Great Enigma

Brianna Thompson is the best detective known. She knew what she wanted in life--she wanted to solve crimes that no one else couldn't. To her, they have always felt like they were puzzles. Everyone she knew struggled with puzzles, but that was one of her specialties, and she never quit. She just had to find another angle.
The best part of it all was the twist, no one knowing how it happened, and it never came back to her. She knew how to cover her tracks well. She would be the last one that you would suspect. She loved putting them together as much as taking things apart. She loved being in control of everyone and having everyone do the work for her. It makes you wonder, who is the real killer? She realizes someone is out of her control, and she doesn't know how she lost control over them until it's too late, which would lead to a sequel.
Throughout all of this, she lives her personal/career life like a normal person so no one can suspect her. She is a very sexually active woman but only shows her wild side to her lover. However, her ex-lover is the one that has made her become the woman she is today.