Outlaw's Bride/Dangerous Allies by Renee Ryan

The Outlaw’s Bride - Catherine Palmer

Isobel Matas must recover her dowry from the outlaws who killed her father. But when Isobel witnesses a murder, her own life is threatened. Now Isobel’s only chance for survival is to marry Noah Buchanan, the rugged trail boss who rescued her. As the mismatched newlyweds unite against Lincoln County’s tumultuous violence, they are led on a journey neither ever imagined.

Dangerous Allies - Renee Ryan

British agent Jack Anderson risks his life working undercover as an SS officer. His latest mission — to uncover intelligence about a secret Nazi weapon — is his most perilous yet. Especially since he’ll have to work with Katarina Kerensky. Jack and Katia join forces to take down the enemy...and learn whether love can survive in a world gone wrong.