John Gray books in order
20 books in the catalogue, about 104 hours of reading in all; the shortest takes 2 hours and the longest 8 hours.
20 standalone books in the catalogue.
Standalone books
What You Feel You Can Heal 4.1 h 
Men, Women and Relationships 5.7 h 
Men Are From Mars, Women Are From Venus 5.9 h 
What Your Mother Couldn't Tell You and Your Father Didn't Know 7.8 h 
Les Hommes Viennent de Mars, les Femmes Viennent de Vénus 5.8 h 
Mars and Venus 2.9 h 
Mars and Venus in the Bedroom 3.8 h 
Mars and Venus Together Forever 5.3 h 
Mars and Venus in Love 3.8 h 
Homens São de Marte, Mulheres São de Vênus 5.6 h 
Mars and Venus on a Date 6.9 h 
Mars and Venus Starting Over 6.1 h 
Why Mars & Venus Collide 5.0 h 
How to Get What You Want and Want What You Have 5.8 h 
Men Are from Mars, Women Are from Venus, Children Are from Heaven 6.8 h 
Mars and Venus in the Workplace 5.9 h 
Straw Dogs 4.5 h 
Truly Mars & Venus 2.4 h 
Beyond Mars and Venus 7.0 h 
Feline Philosophy 2.6 h