His Soldier Under Siege by Regan Black

She’s the soldier but he’s the only one who can protect her…

When army nurse Grace Ann Riley is framed for a heinous crime, the shell-shocked major is unsure where to turn. Enter her no-strings-attached lover Derek Sayer, who resolves to help her disprove these allegations. Derek works to exonerate Grace Ann while trying—and failing—to keep his growing feelings at bay. He’ll stop at nothing to keep her safe—even if that means risking his life.