The Medford Public Library, Medford Historical Society & Museum, and Friends of the Medford Public Library continue their new History Book Group with a virtual discussion of "Killers of the Flower Moon: The Osage Murders and the Birth of the FBI," by David Grann. In 1920s Oklahoma, many members of the oil-wealthy Osage Nation were dying suspicious deaths. Author Grann tells the story of the investigation that led to birth of the FBI. The discussion will be led by Barbara…