The Fire You Hold by Ciana Stone

Some things are stronger than metal and stone, like loyalty and love. Which makes the loss of either, a blow that strikes clear through to the heart.
Loss has hit the Walker family hard, with the death of the family patriarch, and having the fiance of his grand-daughter accused of murdering him.
If that wasn’t enough, someone is determined to hurt both Heritage and Kal Burton, so it seems their fates are linked in more than Kal’s love for Cici Walker.
There’s a mystery to be solved and a lot of people determined to solve it, including the man who holds the reins of Heritage, Russell Walker. He’ll do whatever it takes to keep his family and their legacy safe, but it’s getting damned hard to know who he can trust. Right now, there’s only one person. Naomie Taylor. The woman who stirs his blood and makes him wish he was twenty years younger.