How to Bewitch a Duke by Dawn Brower

Lady Isla Thompson has always lived in the shadow of family secrets and unspoken promises. Bound by a duty to protect her heart after a devastating heartbreak, she has kept her emotions carefully guarded—until Lucian Oliver, the Duke of Thornridge, reenters her life. Once the love of her life, Lucian broke her heart years ago, leaving her to pick up the pieces. Now, he’s back, more determined than ever to win her heart once again.
Lucian, tormented by past choices and driven by a dangerous secret, never expected to fall in love with Isla. When duty and love collided, he pushed her away, fearing the danger his life posed to hers. But as his past resurfaces, he realizes that he cannot live without the woman he has always loved. With his heart on the line, Lucian vows to do whatever it takes to prove that the love they once shared is worth fighting for.

Isla and Lucian must navigate the treacherous waters of their past to find a future together. Will Isla trust him again, or will their second chance be too late to save?