She Came by the Book — Mary Wings

As a lesbian, I never thought that I would mind another woman wearing the same dress to a big event. But the woman was Tracy Port, and the dress looked great on her even while she was being poisoned at my feet...

San Francisco P.I. Emma Victor has been entrusted with some important personal papers that once belonged to Howard Blooming, the prominent gay politician assassinated decades earlier. But the papers--which are supposed to be kept sealed for sixty years--may be even more important to someone else. After Emma herself is physically attacked, another woman is poisoned at the opening of the archive dedicated to Blooming's memory. Now Emma has to unravel a mess of public affairs and private secrets--to bring a killer out into the light of day...