Men are from Mars, Women are from Venus book by John Gray.
The Brilliant Guide to Understanding the Opposite Sex.. Drawing on years of successful counseling for singles and married couples, Men Are From Mars, Women Are From Venus has helped millions of married couples transform their relationships for the better. Now considered a modern classic, this book - The Phenomenon - has helped men and women truly understand their differences, as well as understand how to communicate in a non-conflict and intimacy manner at every possible opportunity.