The Road to Wealth and Freedom (3 volumes in total)

No matter how high or low your income is, whether you are satisfied with your income or not, there will always be someone who earns much more than you, some earn twice as much as you, and some even earn ten or twenty times as much as you. ……How did that happen? Are these people ten or twenty times smarter than you? Do they work ten or twenty times harder than you?

of course not. They just know how to play the game about revenue, they know the rules of the game. What you have in your hand is a book about these rules. Now, Bodo Schaefer has taught these rules, allowing you to significantly increase your income without extending your working hours or increasing your work intensity, increasing 20% within 1 year, doubling your personal assets within 3 years, and enjoyment and satisfaction at work.