The Mysterious Graves by Morgan Kelley

Warning: This book contains language, sex, and spooky ghosts haunting the magnificent castle.

His heart is broken, and all Michael Graves wants to do is get away. His fiancé burned him, making it look like he betrayed his family, the Blackhawks.
It was a cut so deep that he’d not recovered. In fact, it was destroying him from the inside out. So, when the family sent him to Scotland, to hide out at Ravensmire, he was more than willing to go.
What could possibly happen there?
Yes, Scotland gave him memories from his past, but that was gone and dead.
Right?
Only, when he walked through that castle door, his whole world, and everything he’d held in his heart was torn free. The past was back, and now, everything hinged on the here and now—not the once before.
Life was about to change.
For Graham Lainey, he’d lost the only man he’d ever loved, and he was mid-spiral to destruction. When D’Artangnan walked back through the door, it blindsided him. Now that he knows D’Artangnan is safe, he can let go.
Graham has nothing more to give.
Only, the castle, and the dead there have not given up on love, and they won’t let him either. The truth of Ravensmire is about to come out, and when it does, neither man will be the same. There are weddings to be had, deaths in it’s future, and a secret that goes back to sixteen hundred.
Will the secrets of Ravensmire come out?
Or will that rage and darkness win?

D’Artangnan and Graham are about to find out with the Mysterious Graves.

And so is Elizabeth Blackhawk–whether she likes it or not.