To Love a Baron by Laura Beers

He returned from war hailed as a hero, but a stranger to himself—and to the wife he never knew he had.
Dominic Stevens, Baron Warwicke, comes home bearing the physical and emotional scars of battle. Haunted by fragmented memories and burdened by duty, he’s stunned to learn he has a wife—a woman he does not remember marrying.
Dorothea rejoices when Dominic comes to remove her from her brother’s abusive household. But the man who stands before her now is colder, harder… a shadow of the husband she once knew. Still, she is determined to reach the heart he has forgotten, believing the man she married is still there, merely buried beneath the pain.
Intent on seeking an annulment to free them both, Dominic fights his growing feelings for the gentle, resilient woman who refuses to give up on him. But when danger threatens Dorothea’s life, Dominic must confront not only his past but also the possibility that the love he thought forever lost in his life may be the very thing that saves them both.