How To Win Friends and Influence People by Dale Carnegie

Competitive Advantage: Creating and Sustaining Superior Performance by Michael E. Porter

The Art of the Deal by Donald Trump

Secrets of Closing the Sale by Zig Ziglar​

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Mark Cuban (Shark Tank)

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About:
Sources:

• ​​https://www.dividend.com/my-money/kevin-o-leary-s-5-must-read-books-for-financial-success/
• https://www.scribd.com/reading-list/62/Kevin-O-Leary-s-Reading-List

Image Source: 

• https://www.flickr.com/photos/ontariochamber/4171670649 (cover image)
• Randstad Canada / CC BY (https://creativecommons.org/licenses/by/2.0) (profile image)