Two Books on Interaction Styles:

Interaction Essentials: 3 Keys to Effective Relationships in the Workplace and Beyond.  Los Angeles, Calif., Radiance House, 2011 by Linda Berens 

Contextual Coaching, 2011 by Susan Nash

A groundbreaking look at type and the brain based on brain activity as well as subject reported thoughts:

Neuroscience of Personality: Brain Savvy Insights For All Types of People. Los Angeles, Calif., Radiance House, 2011 by Dario Nardi

The following books I've authored or co-authored are available through Radiance House:

Understanding Yourself and Others, An Introduction to the 4 Temperaments. 4.0. , Huntington Beach, Calif.: Telos Publications, 2010. by Linda V. Berens.

Understanding Yourself and Others: An Introduction to Interaction Styles. 2.0.  Los Angeles, Calif.: Radiance House Publications, 2008.by Linda V. Berens.

The Sixteen Personality Types, Descriptions for Self-Discovery. Los Angeles, Calif.: Radiance House Publications, 1999. by Linda V. Berens and Dario Nardi.

Understanding Yourself and Others, An Introduction to the Personality Type Code , Huntington Beach, Calif.: Telos Publications, 2004. by Linda V. Berens and Dario Nardi.

Quick Guide to the 16 Personality Types and Teams. Huntington Beach, Calif.: Telos Publications, 2004. by Linda V. Berens, Linda K. Ernst, and Melissa A. Smith.

Quick Guide to the 16 Personality Types in Organizations. Huntington Beach, Calif.: Telos Publications, 2001. by Linda V. Berens, Sue A. Cooper, Linda K. Ernst, Charles R. Martin, Steve Myers, Dario Nardi, Roger R. Pearman, Marci Segal, and Melissa A. Smith.

Quick Guide to Interaction Styles and Working Remotely. Huntington Beach, Calif.: Telos Publications, 2003. by Susan Gerke and Linda V. Berens.

The I in Team. Huntington Beach, Calif.: Unite Business Press a division of Telos Publications, 2004. by Susan K. Gerke and Linda V. Berens.

Other books I recommend that are also available through Radiance House.

Character and Personality Type;  Discovering Your Uniqueness for Career and Relationship Success. Huntington Beach, Calif.: Telos Publications, 1999. by Dario Nardi.

8 Keys to Self-Leadership. Huntington Beach, Calif.: Unite Business Press a division of Telos Publications, 2005. by Dario Nardi.