Her Little Black Book (Bennett Family #4)
Brenda Jackson

But just when she is about to give up and toss the infamous little black book into the garbage, she meets Lake Masters. Nearly ten years her senior, he’s a lot older than the men she’s normally attracted to, but he’s handsome, intelligent, wealthy, and a man who is determined to sweep her off her feet. But the road to love is never easy and Courtney may find that her little black book is more a curse than a blessing.