The Lanvin Murders — Angela M. Sanders

All Portland, Oregon, vintage clothing store owner Joanna Hayworth wants to do is turn her back on the modern world and retreat into a carefully curated life of satin cocktail gowns, icy martinis, and old movies. But when Joanna finds a key in a 1930s Lanvin coat cast off by an ex-showgirl, everything changes. The elderly woman turns up dead, and Joanna is pulled into a long-ago drama of back room deals, blackmail, and lost love. She must find a very real-and present day-killer before she becomes his next victim.