Dare To Ask
An interactive book helping to understand the opposite sex, with interpersonal self-help communication tools to stimulate more romantic conversation.
http://www.daretoask.com/

The Right Relationship Can Happen
Self-help book on finding the ideal partner through a step-by-step program.
http://www.yourtruematch.com

Undefended Love
A practical guide to relationships, by Jett Psaris and Marlena S. Lyons.
http://www.undefendedlove.com/

Unmarried to Each Other
A book for couples who are living together or considering cohabitation, based on interviews, real-life stories, and research.
http://www.unmarriedtoeachother.com/

When Love Calls Again
Discussing how to manage new relationships when the first ones fail. Includes excerpts and health tips.
http://www.bravelove.com/