Walter Richard Cassels' "Supernatural Religion" is a meticulously researched three-volume work that delves into the origins and historical context of early Christianity, emphasizing the evolution of religious thought and the notion of the supernatural. Cassels employs a critical, analytical style that navigates through biblical texts, ancient writings, and contemporary scholarship, revealing the complex interplay between mythology and historical accounts. His examination of the formative years of Christianity provides a profound exploration of the socio-cultural dynamics that shaped religious beliefs and practices, engaging with both theological and secular perspectives. Cassels was a noted biblical critic and scholar deeply embedded in the intellectual debates of the late 19th century, an era marked by a conflict between faith and emerging scientific thought. His background in classical studies and keen interest in comparative religion informed his rigorous, often controversial positions on the nature of religious texts. Cassels sought to challenge the traditional narratives surrounding Christianity, thus offering readers a refreshing, albeit provocative, lens through which to understand early religious movements. "Supernatural Religion" is highly recommended for scholars, students, and general readers who seek a thorough understanding of Christianity's foundations through a critical historical lens. Cassels' scholarship encourages readers to question established beliefs and engage with the complexities of religious phenomena, making this work an essential addition to any library focused on theological studies and the history of Christianity.