This book is a compilation of Swami Vivekananda’s lectures and writings on Buddha and Buddhism. It highlights Vivekananda’s deep spiritual kinship with Buddha, whom he considered his Ishta (chosen ideal) and the perfect embodiment of India’s ancient wisdom.

This book give details of Swamiji’s lifelong devotion, from a youthful vision of Buddha to his pilgrimage to Bodh Gaya. He admired Buddha’s "boundless compassion" and "fearless quest for Truth," often presenting him to Western audiences as the ultimate spiritual exemplar. The book is structured in two parts: primary lectures and scattered observations.