Joe Rogan: "I really can’t recommend this book enough. It’s one of the best and most insightful books I’ve ever read."

Tony Hsieh: "I have been really influenced by this field called the "science of happiness." One great book in this field is 'The Happiness Hypothesis'"

Charles Koch recommended this book on his website.

David Friedberg: "Very graphic and interesting, but if you've seen the movie I don't think you get much more from the book"

Charles Koch recommended this book on his website.

Naval Ravikant: "Everything by Matt Ridley is worth reading."

Charles Koch recommended this book on his website.

Balaji Srinivasan: "I find books like this useful as an alternate perspective on the [Great Depression] era"

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Michael Saylor recommended The Road to Serfdom on his Bitcoin website, Hope.com

Changpeng Zhao: "This short (only 60+ pages) but timeless book by French essayist Bastiat is pretty advanced for its time, and it aligns with a lot of my personal philosophy."

Charles Koch recommended this book on his website.

One of the four books that taught Charles Koch "how the world works.”

Michael Saylor recommended Human Action on his Bitcoin website, Hope.com

Charles Koch: "Business leaders who advocate for special interest cronyism and corporate welfare do so to the detriment of the larger business community and our country as a whole.

This book shines a light on how the current political system enables those in power—both in and out of government—to stack the deck against people who start with little or nothing."

Mark Cuban mentioned reading 'The Politics Industry' on Twitter.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

Charles Koch recommended this book on his website.

One of the four books that taught Charles Koch "how the world works.”

One of the four books that taught Charles Koch "how the world works.”

One of the four books that taught Charles Koch "how the world works.”

Charles Koch mentions 'Why Wages Rise' in his book 'Good Profit'.

Charles Koch recommended 'Frames of Mind' on the 'Tim Ferriss Show' podcast.