His Rebellious Heart - The Rebels, Rakes, and Rogues Series

Sir Baron Lacey lives a life of prominence and position, until he's falsely accused of his fiancée's murder. Unable to claim his title and family estate, he follows a killer's trail from one end of England to another. Lady Ella Baxter always does what is expected of her, except where Baron Lacey is concerned. When she finds the man she loves shot and close to death, her loyalties will be challenged more than ever before.
Tracking a killer was difficult enough for Baron but when Ella becomes the murderer's next target, he must decide what is more at risk, Ella's life or his rebellious heart.