This is a research-based book on the divine life, teachings, spirit messages, and contributions of Sri Shirdi Sai Baba (1838-1918), the renowned Sufi saint of India. It highlights his importance as the 'Jagat Guru (Universal Master) whose teachings and messages elevate all people spiritually and morally and unite them. His main teachings are Allah (God) is one who is the sole master of all; the same 'atma'(soul) is in every creature; everyone is linked to others according to one's past actions and Rinanubandh (bond of give and take), and so one must be kind, compassionate, and helpful to all those who come in this life. He is now the supreme ascended master. He appears before people who earnestly remember him, in their dreams or in any other person's form to guide, inspire, save, and help them to solve their problems instantly. His Dwarka Mai masjid (mosque) and samadhi Mandir temple in Shirdi are well-known to billons of people of all regligions and cultures and are visited by thousands of people daily and by even more than hundred thousand pilgrims from all lovers of the world to seek his grace. This book was written by the devotee author as desired by the spirit of Sri Shirdi Sai Baba communicated to Sri Lakshman Swami, founder, Adi Sankarachrya and Dattratreya Adhyatmic Bhakti Mandli, Bangalore in 1992 and was blessed by Shivamma Thyayee of Roopen Agraha, Bangalore, who was then the only surviving 102-year-old contemporary devotee of Sri Shirdi Sai Baba and by Sri Shivnesh Swami of Shirdi. It has been one of the most popular books on Sri Shirdi Sai Baba since then. This revised and updated new edition provides valuable information on prominent Shirdi Sai temples, organizations, journals, and websites in the world. It will enlighten and spiritually uplift the readers belonging to all religions, cultures, and nations.