The concept of a "killer" includes individuals who commit murder, often surrounded by psychological complexity or moral ambiguity. Authors like Harold Ward depict murderers as figures of tension and survival, while Samuel Vaknin portrays them as agents of control and psychological dominance.
Frank Belknap Long examines their unpredictability, contrasting menace with everyday interactions, and Jack London presents them as primal forces of nature. Ellen Buckingham Mathews adds gothic elements, highlighting visceral horror. These diverse depictions reveal the killer as a multifaceted symbol of violence, guilt, and human darkness, reflecting societal fears and moral dilemmas.