Where to begin? And certainly there’s a lot more than one and this is a far cry from a complete list, but here’s a few especially significant books for me:
The New Testament,
The Books of Enoch,
The Dead Sea Scrolls,
The Gnostic Gospels, by Elaine Pagels,
The Nag Hammadi Library,
The Gospel of Thomas,
The Odes of Solomon,
The Confessions of Jacob Boehme,
The Cloud of Unknowing,
Metaphysical Meditations, by Paramahansa Yogananda,
The Tiger’s Fang by Paul Twitchell,
The Making of a Spiritual Movement, the Untold Story of Paul Twitchell and Eckankar, by David Lane,
The Sants: Studies in a Devotional Tradition of India (several contributing authors),
Radhasoami Reality: The Logic of a Modern Faith, by Mark Juergensmeyer,
Songs of Kabir, by Rabindranath Tagore,
The Anurag Sagar, Kabir’s Ocean of Love, by Sant Dharam Das,
The Adi Granth (all of the volumes of the Sikh Scriptures or Gurbani),
Sant Namdev,
Dadu, the Compassionate Mystic,
Tukaram, The Ceaseless Song of Devotion,
Dariya Sahib, Saint of Bihar,
Tulsi Sahib, Saint of Hathras,
Sar Bachan Radhasoami Poetry, Volumes I & II, by Soamiji Maharaj,
Prem Patra Radhasoami, Volumes I – VI, by Huzur Maharaj Rai Saligram,
Radhasoami Mat Prakash, by Huzur Maharaj Rai Saligram,
Prem Bani Radhasoami, Volumes I – IV, by Huzur Maharaj Rai Saligram,
Jugat Prakash, by Huzur Maharaj Rai Saligram,
Philosophy of the Masters (Gurmat Sidhant), Volumes I – V, by Huzur Baba Sawan Singh,
Naam Or Word, by Kirpal Singh,
Cry of the Soul, by Darshan Singh,
Philosophy Of Liberation (Moksha-Darshan), by Maharshi Mehi Paramhans,
The Padavali of Maharshi Mehi Paramhans,
Harmony Of All Religions (Sarvadharma Samanvy), by Swami Santsevi Ji Maharaj ,
Santmat Tatva-Jnaan Bodhini, by Shri Bhagirath Baba,
The Inward Journey of the Soul (Chal Hansa Nij Desh), by Swami Vyasanand Ji Maharaj,