Occult Japan: The Way of the Gods is Lowell's vivid inquiry into the ecstatic and esoteric dimensions of Shinto practice, especially mountain worship, spirit possession, pilgrimage, and the disciplined techniques by which devotees sought communion with the kami. Written in a lucid, observant, occasionally theatrical late-Victorian prose, the book stands at the intersection of travel writing, comparative religion, and early ethnography. Its value lies not only in its descriptions of rites at Ontake and elsewhere, but also in its record of a Japan whose religious life was being reinterpreted under modernity and Western scrutiny. Percival Lowell, better known as the astronomer associated with the "canals" of Mars, was also a cultivated American Orientalist who spent significant time in East Asia. His earlier writings on Japan and Korea reveal a mind drawn to systems of belief, social ceremony, and hidden order. That curiosity, combined with direct observation and the period's appetite for "occult" religion, shaped his attempt to explain Shinto experience to English-speaking readers. Recommended for readers of Japanese religion, intellectual history, and Victorian encounter literature, this book should be approached critically yet appreciatively: as a revealing document of both Japanese devotional practice and Western interpretation.