The Wisdom of the Koran

The Road Less Travelled: A New Psychology of Love, Traditional Values and Spiritual Growth

The Wisdom of the Torah

The Cost of Discipleship

The Wisdom of the Talmud

A History of Religious Ideas, Volume 2: From Gautama Buddha to the Triumph of Christianity, Volume 2

The Wisdom of Buddha

Transcending the Levels of Consciousness: The Stairway to Enlightenment

Summa Theologica (All Complete & Unabridged 3 Parts + Supplement & Appendix + interactive links and annotations)

The Wisdom of Sartre

Fear and Trembling

The Wisdom of Albert Schweitzer

The Wisdom of the Kabbalah

The Wisdom of Confucius

Buddhist Stories Volume 1

The Wisdom of Leonardo da Vinci

On the Way to Krishna

Five Volumes of Spiritual Wisdom: The Wisdom of the Torah, The Wisdom of the Talmud, The Wisdom of the Koran, The Wisdom of Muhammad, and The Wisdom of Buddha