The reckless bride / Stephanie Laurens.

Four officers of the Crown, aided by Bastion Club members and Cynsters alike, fight to bring down a dangerous enemy -- and win the loves of their lives. A bold, courageous, determined ex-officer of the Crown, Captain Rafe Carstairs is the final hope for thwarting the evil traitor known only as The Black Cobra. A roguish charmer but possessing inner steel, he races to complete his assignment against impossible odds--a mission made suddenly more perilous by the proud English rose he must now protect from villainous hordes. As brave as she is beautiful, she dares not trust the enigmatic stranger who guards a secret behind his rake's smile--though her heart insists she follow him into danger's jaws. Thrown together by chance but united by fiery need, they draw strength from their shared passion--as they embark upon the most breathtaking adventure of all.