Books like Ploughing the Clouds by Peter Lamborn Wilson

The Tao of Physics examines the resonances between modern physics and Eastern mysticism, illuminating how concepts like the Tao, quantum theory, and the nature of reality intersect across science and spirituality.

The Kybalion offers the core principles of Hermetic philosophy, tracing their origins in ancient Egypt and Greece and inviting scholars to reflect on the enduring truth of these timeless teachings.

Michael J. Harner’s definitive guide to shamanism offers practical insight, historical context, and a framework for personal participation, drawing on more than a quarter‑century of study and practice.

Written by an anonymous English monk during the late fourteenth century, The Cloud of Unknowing holds an important place in the history of both Western literature and spirituality. Though originally intended for a select audience, the work's simple, engaging style has won it widespread popularity since its rediscovery more than a century ago. The Cloud puts forth a method of contemplation that stresses the impotence of the understanding to break through the cloud of unknowing that separates God and humanity. Rather, "it is love alone that can reach God in this life". In his preface to this volume, Simon Tugwell sums up the challenge that the author of The Cloud presents us today: "If we wish to follow him, we must be prepared to be taxed to the limit. But if we have the courage and the ability to follow him, we shall not find that our efforts has been in vain."

This classic study in the evolution of the human mind is a pioneering work as valuable today as when it was first published in 1901. At that time, it was enthusiastically acclaimed by both William James and P. D. Ouspensky. It has long been accepted as a landmark in the field of mysticism. In reviewing the mental and spiritual activity of the human race, Dr. Bucke discovers that at intervals certain individuals have appeared who are gifted with the power of transcendent realization—or Illumination. Their experiences constitute a definite advance in man’s relation with the Infinite. Moreover, the author shows from available records that this transfiguring endowment of Illumination is on the increase, and he gives full details of practically all the cases on record up to the time when the book was written.