Invitation to a Killer by G.M. Malliet
Our amateur sleuth in Invitation to a Killer is Augusta Hawke, who doesn't seem to actually do much writing. I guess she isn't quite an amateur, she got her PI license after helping solve the case in the first book, which I didn't read. This time around she's at a party hosted by a lobbyist's wife when a celebrated doctor dies. At first, the death is written off as a heart attack, but of course, we're not surprised when it turns out he was murdered. Someone at the party killed him. Was it one of the CIA couple, the lobbyist or his wife, the book publisher, the image consultant, the congressman or his wife? It could even have been the cook or the butler. Augusta decides the police aren't treating the death as the murder it clearly was, so starts investigating on her own.
Augusta is kind of a bland character, but hearing the story (I listened to the audiobook) from...