Spiritual

The Continents Hidden Beyond Antarctica's Ice Wall

A Damn Good Book About Enlightenment

I'd Like To Call for Help, but I Don't Know the Number

The Art Of Self-Development

Power Over People

The Way of Zen

The Silence of the True Self

What Really Counts for Men

Seeds for the Soul

Kindness and Wonder

The Witness Within

The Codex of Awakening

The Way of Initiation; or, How to Attain Knowledge of the Higher Worlds

Prentice Mulford: Autobiographical Works (Life by Land and Sea, The Californian's Return & More)

The Sufism of the Rubáiyát, or, the Secret of the Great Paradox

The Doctrine and Practice of Yoga

The Land of Content

The Romance of the Soul

Making the Most of Life

The Voice and Spiritual Education