Ace of Hearts by J.C. Valentine

Being granted a second chance at life and a first time at love was every man’s dream, but for Ace it came with a price/

Ace: By all rights, he should be dead. Serving ten years in prison for a crime he didn’t commit had affected him in ways he couldn’t begin to understand. He’d rolled out of the slammer and into a revenge plot that almost got him killed. By the grace of God, when he’d hit rock bottom, one person reached out a helping hand. A beautiful redhead with a penchant for mischief took a shine to him and then disappeared, leaving behind only her number scribbled recklessly on his arm. Assuming he can make out all the numbers, he just might have a chance at something amazing.

Barbara: Finally divorcing her narcissistic husband was the best choice Barbara ever made. After living under his control for seven long years, she might have gone a little wild for a minute, what with jumping the hot biker and all. None of that mattered, though, because today was the day she got herself back on track. After being given the opportunity to excavate a small cache of fossils in a remote area, Barbara is horrified to discover she’s inadvertently led a small team of her archeology students into danger. When they stumble on a secret dumping site of a vicious serial killer, Ace, the big, handsome biker takes charge. But she may have gotten herself and her students into more danger than even he can handle.