Presented as part of the Bettendorf Public Library's “Community Connections” series, a number of Iowa's most notorious and horrific unsolved killings will be explored in the October 14 program Fiend Incarnate: Villisca Axe Murders of 1912, with Dr. Edgar Epperly discussing his book of the same title and the Midwestern mystery that continues to puzzle professional and amateur true-crime investigators.