These include inspirational/motivational books like
Think and Grow Rich by Napoleon Hill,
How to Win Friends and Influence People by Dale Carnegie,
The Magic of Thinking Big by David Schwartz,
The Strangest Secret by Earl Nightingale,
The Power of Positive Thinking by Norman Vincent Peale,
Acres of Diamonds by Russell Conwell and
The Greatest Salesman in the World by Og Mandino.