The Impersonator by Mary Miley

Vaudeville and Prohibition in the Roaring Twenties form the setting for this murder mystery in a small town in Oregon.  A young vaudeville performer bears a striking resemblance to a missing heiress, and the heiress's devious and unscrupulous uncle plots to use Leah to impersonate Jessie Carr, who reappears on her 21st birthday to claim her inheritance.  Leah has been on stage since her childhood, so becoming Jessie is no great challenge, but what if her secret is uncovered?  She could go to jail or worse, face the same fate as Jessie, who is probably dead.  Leah, as Jessie, has to fool her aunt, cousins and grandmother while exploring the family estate and asking questions to figure out the truth before Jessie's murderer makes her his next victim.