About the AuthorJohn Gray, Ph.D. is the #1 bestselling relationship author of all time. He is the author of over 20 books, including The New York Times #1 Best-Selling Relationship Book of All Time: Men Are from Mars, Women Are from Venus. His books have sold over 50 million copies in 50 different languages around the world. are there apps that recommend books Por qu chocan Marte y Venus? (Spanish Edition)