The most well-know, long-lived, and tried-and-tested relationships guide ever: the phenomenal #1 New York Times bestseller Men Are From Mars, Women Are From Venus . In this classic guide to understanding the opposite sex, Dr. John Gray provides a practical and proven way for men and women to improve their communication by acknowledging the differences between their needs, desires, and behaviors. No other relationship guide on the market will give you the same level of evidence-based insight sure to help you strengthen and nurture your relationships for years to come.