Mark Cuban: "Principles is the book I wish I had as a young entrepreneur, stressing over not knowing what I didn't know."

Tony Robbins: "I found it to be truly extraordinary."

Arianna Huffington: "Beautifully written and filled with such wisdom."

Michael Bloomberg: “Ray Dalio’s market acumen is legendary, but it was creating and living by a set of principles that allowed him to reach the top. Everyone with goals and dreams can learn from Ray’s approach.”

Reed Hastings: "Principles had a profound positive impact on my leadership style."

Jack Dorsey: "Principles is helpful in showing people how to operate by clearly articulated and shared principles that lead to faster progress."

Tim Ferriss: "I highly recommend this book. It has already changed how I think about making decisions in my life and in my business, how I think about managing, how I think about managing, how I think about communications between teams."

Kevin Systrom: "I was blown away. It’s both a guide to life, a guide to business, and also I think an insight into Ray and someone who’s built an amazing business."

Naval Ravikant: "As with most non-fiction, the meat was in the beginning."

Sheryl Sandberg: "[The Lean Startup] provides a great inside look at how the tech industry approaches building products and businesses."

Kevin Systrom: "I don’t know that I read the entire thing, but the principles from Lean Startup, I still apply today."

Mark Cuban: “The Lean Startup tackles the question, 'Why do most start-ups fail?'"

Jason Calacanis: "You need to read 'The Lean Startup'"

One of five business books Chris Dixon recommended on Twitter.

Raoul Pal enjoyed reading 'The Lean Startup'.

Shane Parrish: "A concise book of lessons drawn from the survey of history. The book comes highly recommended by someone I met at the Berkshire Hathaway meeting last weekend.

I can’t believe I haven’t read this before. I’ll be re-reading this a few times and I’ve started listening to the audio version in the car as well."

Naval Ravikant: "Concise and well written, summarizes the long arc of history with poetic insights."

Tim Ferriss: "Fantastic book. I read [The Lessons of History] because Ray Dalio recommended it."

Kevin Systrom: "It’s a great book."

Kevin Systrom: "It is a book about basically manufacturing and supply chain management. It sounds really boring, but I promise you it’s really good."

Included on Jeff Bezos' list of books that Amazon employees refer to as “Jeff’s Reading List.”

Joe Rogan: "Hearing [Malcolm Gladwell] do the audiobook is great"

Kevin Systrom listed 'The Tipping Point' among his favorite books on Facebook.

Shane Parrish: "If you believe that you’re not getting everything out of your reading that you should, this book is awesome.

When is the last time someone intelligent showed you how to read, skim, and evaluate what you’re reading?"

Kevin Systrom: "Go buy the book"

Kevin Systrom listed 'Visual Explanations' among his favorite books on Facebook.

Kevin Systrom mentioned 'The Mathematics of Politics' on 'The Tim Ferriss Show' podcast.

Kevin Systrom mentioned 'The Signal and the Noise' on Instagram.

Kevin Systrom listed 'Blink' among his favorite books on Facebook.

Kevin Systrom listed 'The Wisdom of Crowds' among his favorite books on Facebook.

Kevin Systrom listed 'The Anatomy of Buzz' among his favorite books on Facebook.

Kevin Systrom listed 'Small Is the New Big' among his favorite books on Facebook.

Kevin Systrom listed 'Nudge' among his favorite books on Facebook.

Kevin Systrom listed 'We Wish To Inform You' among his favorite books on Facebook.