This volume investigates the historical evolution and cultural integration of Buddhism within Tibet, specifically examining the transition from indigenous magic-worship to organized religious practice. Sir Charles Bell, a British diplomat and scholar with extensive experience in the region, utilizes his unique access to Tibetan society to document the religious landscape of the early twentieth century. He provides a comprehensive framework that balances historical narrative with ethnographic observation, tracing the institutional development of Tibetan Buddhism alongside the decline of the ancient Ponism tradition.

Experts recognize this work as a significant primary source for understanding the religious and political climate of Tibet prior to the mid-twentieth century. Readers frequently note the academic density of the prose, which reflects the author's meticulous attention to historical detail and cultural nuance.