This anthology investigates the core theological, mystical, and literary tenets of Sufism through a curated selection of primary source texts. John O. Voll, a scholar of Islamic history, compiles these writings to provide a comprehensive overview of the Sufi tradition. The work examines the development of mystical thought across various centuries and geographical regions, offering a structured framework for understanding the internal evolution of Islamic spirituality. By presenting these diverse voices, the text argues for the centrality of the Sufi experience within the broader context of Islamic intellectual history.

Scholars and students of religious studies frequently cite this anthology as a useful entry point for those seeking a broad introduction to the diversity of Sufi thought. Readers often note the academic rigor of the selection process, which balances accessibility with historical depth.