The Elusive Earl by Grace Burrowes

He’s carrying a torch…
Graham MacNeil wants nothing to do with the family earldom, much less with a drafty castle full of rumgumptious relatives, or with the nosy neighbors determined to inspect the prodigal laird. His sole reason for returning from exile is to discover the truth behind the crime that saw him consigned to seven years transportation.

And she’s carrying grudge!
The sole reason, that is, other than Graham’s abiding and undeclared regard for Miss Morna MacKenzie. Morna was devastated by the old scandal and by Graham’s departure. She’s not about to give any more of her heart to a man who kept secrets then and is still keeping secrets now. Graham and Morna will have to learn to trust each other and their hearts if they are to discover who was responsible for shattering their world years ago, and who will go to any lengths to keep them apart now.