This collection brings together new papers addressing the philosophical challenges that the concept of a Devil presents, bringing philosophical rigor to treatments of the Devil. Contributors approach the idea of the Devil from a variety of philosophical traditions, methodologies, and styles, providing a comprehensive philosophical overview that contemplates the existence, nature, and purpose of the Devil. While some papers take a classical approach to the Devil, drawing on biblical exegesis, other contributors approach the topic of the Devil from epistemological, metaphysical,...