In this video, the speaker discusses the five books that helped him become a successful CEO in his 20s. The first book is "How to Win Friends and Influence People," which taught him to be curious and ask questions rather than being judgmental. The second book is "Man's Search for Meaning," which taught him that circumstances do not dictate our feelings, but rather our thoughts about them. It also taught him to face death and be okay with the worst-case scenario. The third book is "Managing Oneself" by Peter Drucker, which taught him the importance of self-awareness in building a successful business. The fourth book is "Rich Dad Poor Dad," which taught him about financial literacy and the importance of building assets rather than relying on a job. The final book is "The Lean Startup" by Eric Ries, which taught him about the importance of experimentation and adapting to change in business.