What is the best comprehensive book on Sri Ramakrishna Paramahamsa?

The Gospel of Sri Ramakrishna, Translated by Swami Nikhilananda, is widely regarded as the most comprehensive book on Sri Ramakrishna Paramahamsa. It is a compilation of the conversations between Sri Ramakrishna and his disciples, students, and visitors, and provides an in-depth look into his life, teachings, and spiritual practices. The book covers a wide range of topics, including devotion, meditation, spiritual enlightenment, and the nature of God. It also includes anecdotes and stories that illustrate Sri Ramakrishna's teachings and his unique personality. The Gospel of Sri Ramakrishna is considered a sacred text in many Hindu traditions and is revered as an essential resource for anyone seeking to learn more about the life and teachings of this influential spiritual master.