Murder And The Hurdy Gurdy Girl by Kate McLachlan

It's 1897, and Susan Bantry is on the run from the law. She ends up in Needles Eye, Idaho, where she works in a hurdy gurdy as a dancing girl. Jo Erin, Susan's childhood friend, is the cross-dressing Pinkerton agent sent to track Susan down. Before she can complete the job, a mining war breaks out and interferes with Jo Erin's plans. Complicating matters even further are the feelings that resurface between Susan and Jo Erin, as events from their past come back to haunt them