Here are some popular books:
Dale Carnegie - How to Win Friends and Influence People
Eckhart Tolle - The Power of Now
Eric Thomas - The Secret to Success
Jack Canfield - The Success Principles
Napoleon Hill - Think and Grow Rich
Rhonda Byrne - The Secret
Stephen R Covey - The 7 Habits of Highly Effective People
Timothy Ferris- 4 Hour Workweek
Tony Robbins - Awaken the Giant Within