Regan O'Reilly, PI, Goes Undercover by Margaret Lake

May, 1942 - Regan O'Reilly is on her way to the biggest assignment of her career as a private investigator. Magnum's Department Store has been plagued by a series of thefts and Regan must go undercover to solve the case.

If she's successful, it will be a real feather in her cap. Not to mention, the job takes her out of the reach of Mark Harris, the man who has begun to win her heart.