The Enneagram Guide to Waking Up: Find Your Path, Face Your Shadow, Discover Your True Self

The Enneagram in Love & Work: Understanding Your Intimate & Business Relationships

The Sacred Enneagram: Finding Your Unique Path to Spiritual Growth

The Enneagram of Passions and Virtues: Finding the Way Home

The Road Back to You: An Enneagram Journey to Self-Discovery

Discovering Your Personality Type: The Essential Introduction to the Enneagram

ADHD 2.0: New Science and Essential Strategies for Thriving with Distraction--from Childhood through Adulthood

The Pocket Enneagram: Understanding the 9 Types of People

The Sociopath Next Door

Surrounded by Idiots: The Four Types of Human Behavior and How to Effectively Communicate with Each in Business (and in Life)

I Thought It Was Just Me (but it isn't): Making the Journey from "What Will People Think?" to "I Am Enough"

Quiet: The Power of Introverts in a World That Can't Stop Talking

New Self, New World: Recovering Our Senses in the Twenty-First Century

The Science of Getting Rich (The Unabridged Classic by Wallace D. Wattles)

The Psychopath Inside: A Neuroscientist's Personal Journey into the Dark Side of the Brain

I Hate You--Don't Leave Me: Third Edition: Understanding the Borderline Personality

Deep Survival: Who Lives, Who Dies, and Why

The Powers of the Mind