Understanding Religious Experiences: What the Bible Says about Spirituality

Equality Exists Only in Islam

The Healing Power of Spirituality: How Faith Helps Humans Thrive [3 volumes]

Hidden Religion: The Greatest Mysteries and Symbols of the World's Religious Beliefs

Explaining Evil: [3 volumes]

The Purpose of Life, Why we are here: A Summary in just 5 pages

Seeking the Sacred with Psychoactive Substances: Chemical Paths to Spirituality and to God [2 volumes]

Feminism and Religion: How Faiths View Women and Their Rights

Being Called: Scientific, Secular, and Sacred Perspectives