Roxy Doyle and the Silver Queen — J.R. Roberts

While in Leadville, Colorado, Roxy Doyle is asked by Silver Baron Horace Tabor to take on the task of finding out who is trying to sabotage his mining operation. At the same time, she meets Tabor's young wife, the Silver Queen Baby Doe Tabor. Both of the Tabors are depending on her to keep their Matchless Mine from going under. To do that she must go undercover at the mine and risk her life to discover who committed sabotage and murder to try and ruin the lives of Horace and Baby Doe Tabor.