An Officer and a Princess — Carla Cassidy

Bound by honor and devoted to his country, dashing lieutenant Adam Sinclair readily agreed to help Princess Isabel Stanbury carry out her brilliant plan to rescue her father, the missing King Michael. But he hadn't counted on the feelings that accompanied a reunion with the only woman he'd ever loved -- or that posing as a married couple would feel so...right. Adam knew the country was depending on their ability to rescue the beloved king, but was he capable of resisting his traitorous heart?