Helen Palmer
Books
The Enneagram in Love and Work: Understanding Your Intimate and Business Relationships
1994
ISBN 9780062031556
The Enneagram Advantage
1998
ISBN 9780517704325
El eneagrama en el amor y en el trabajo
2003
ISBN 9788495973047
The Big Purple Book of Beginner Books
2012
ISBN 9780307975874- No cover
Pleasure Beach
2023
ISBN 9781913513443 
The Enneagram: Understanding Yourself and the Others in Your Life
1988
ISBN 9780062506832