The Secrets to Power, Mastery, and Truth is an anthology of the very best self-improvement essays of singularly gifted writer William George Jordan (1864–1928). Selections were drawn from The Kingship of Self-Control, The Majesty of Calmness, The Power of Truth, and The Crown of Individuality, and in some cases further condensed, resulting in the most potent distillation of Jordan's uncommonly keen wisdom ever to have been published.

Jordan touches on many existential, philosophical, and personal development themes that have recently reemerged as popular principles in our own time, including Stoicism, simplicity, self-reliance, and the paramount importance of living truthfully. Unlike many modern authors, however, Jordan does not forward a vision of discipline and mastery that is focused solely on the self; instead, he also deals with an individual's relations with family, friends, and community. He encourages the reader to improve his own life, in order to improve the lives of others.

Each of the essays are short and “devotional” in nature and rich in incisive, edifying insights that will help the reader see his life through a transformative lens.

For the individual who seeks greater personal strength and character, sees the pursuit of self-development not as a shallow, superficial lark but a committed, lofty conquest, and is, as Jordan puts it, “determin[ed] to live nearer to the limits of his possibilities,” great treasures lie within.