Betrothed to the Enemy Viking

A wounded Viking warrior
Must keep his enemies close...
Left for dead by a mysterious attacker, Viking warlord Kal Randrson comes around with a deep head wound and a hazy memory, yet he instantly recognizes his rescuer—captivating Lady Cynehild, whose life he turned upside down years before. Although she's his enemy, they agree to a fake betrothal to expose his attacker. But is the capable, intriguing Cynehild's mission to help him, or has she another intention entirely?
From Harlequin Historical: Your romantic escape to the past.
Vows and Vikings
Book 1: A Deal with Her Rebel Viking
Book 2: Betrothed to the Enemy Viking