The Crusader’s Vow by Claire Delacroix

Returning home to Scotland triumphant after his military service, and entrusted with the precious relic of the Templars, Fergus is more than ready to wed his beloved Isobel and begin their life together.

To his dismay, Isobel has wed another in his absence, and he believes all of merit is stolen from his life—until Leila resolves to win the valiant highlander’s heart for her own. She is convinced of her own success, until Isobel tempts Fergus anew.