One Dark Night by Jaid Black

From the Publisher
When Dr. Nikki Adenike's rendezvous with an Internet playmate turns into a life-and-death fling with the serial killer called "Lucifer," she manages to escape—into the arms of the detective investigating the case. But the danger is far from over—and a newfound passion is just beginning.
Back of the book- A fling to die for
From a daring, fresh new voice in romantic suspense comes this sizzling erotic thriller about a workaholic surgeon who jump-starts her love life by meeting a sexy bad boy for a naughty rendezvous – and crosses the dangerous line between fantasy and reality…
Dr. Nikki Adenike is successful and content with who she is – but her love life is nowhere. Used to be in control, she longs to surrender herself to her most secret fantasies. So, night after night, Nikki searches the Web. There, she finds Richard – a seductive stranger uncannily attuned to her desires, someone almost too good to be true...
The press has dubbed him “Lucifer,” a smoothie who’s charmed his way into the hearts of many smart, accomplished women with his killer sex appeal. Women who trusted him, who surrendered their bodies to him – and ultimately their lives.
Nikki is the one woman who manages to escape - running straight into the arms of the detective investigating the killings. But the danger is far from over. And a newfound passion is just beginning...
NOTE - Do not let the romantic suspense fool you...there was some seriously sick shit going on in this book. Additional notice -- it does have some S&M type scenes in it.