Men Are from Mars, Women Are from Venus by John Gray (Author)

The Phenomenal #1 New York Times Bestseller

In his classic guide
to understanding the opposite sex, Dr. John Gray, provides a practical and
proven way for men and women to improve their communication and relationships
by acknowledging the differences between them.
Once upon a time Martians and
Venusians met, fell in love, and had happy relationships together because they
respected and accepted their differences. Then they came to Earth and amnesia
set in: they forgot they were from different planets.