Tim Ferriss: "One of my favorite books of the last five years."

Stewart Butterfield: "'How to Change Your Mind' is a great overview of research into the therapeutic uses of psychedelics.

Michael Pollan is such a gifted observer and clear writer. Total pleasure."

Vinod Khosla: "This is a fun exploration of psychedelic drugs, especially for someone who has never tried them."

Michael Mauboussin: "[How To Change Your Mind] helped me think better in 2018."

Naval Ravikant's answer to 'Do you have any advice for dealing with the death of a parent?'

Marc Andreessen: "Smash hit in Japan, and easy to see why. Adlerian psychology meets Stoic philosophy in Socratic dialogue.

Compelling from front to back. Highly recommend."

Anthony Pompliano: "This book is tremendous. Highly recommend!"

Stewart Butterfield: "'The Courage to be Disliked' — which, right off the bat: great title, and definitely something I need — is a very traditional Socratic dialog, originally written in Japanese, principally about the work of the Austrian psychotherapist Alfred Adler.

Will cause keen self-reflection!"

Tobi Lutke: "It is probably the best book I’ve read in the last couple of years."

Garry Tan: "Two objectives in Adlerian psychology: be self reliant and live in harmony with society"

Satya Nadella: "The Rise and Fall of American Growth concludes that innovation is the ultimate source of dramatic improvements in the human condition”

Stewart Butterfield: "I'm reading this book and I can already tell I am going to be so annoying about it afterwards. Sorry in advance"

Patrick Collison included this book on his list of recommended books.

Bill Gates: "The book was a fantastic read, and well worth the time"

Stewart Butterfield: "Audio version of Hillbilly Elegy, read by author JD Vance, was five stars. Human, perceptive, loving, well-told."

One of 10 biographies Jason Calacanis recommends reading.

Max Levchin shared 'Hillbilly Elegy' on his LinkedIn page.

Bill Gates: "Hillbilly Elegy gave me new insights into poverty in America."

Tobi Lutke: "Great book published by Stripe Press. I really love tech history books like this."

Stewart Butterfield recommended this book to Tobi Lutke.

Patrick Collison included this book on his list of recommended books.

Brian Armstrong: "I do agree that all networks tend toward centralization over time. Great book on this."

Arianna Huffington: "A must-read for all Americans who want to remain the ones deciding what they can read, watch, and listen to.”

Stewart Butterfield: "The book is excellent"

Stewart Butterfield: "I first read it almost 20 years ago and there is rarely a working day where the basic ideas don’t explicitly come into the conversation.

7+ years since launching Slack, positioning is still our biggest challenge."

Patrick O'Shaughnessy: "'Positioning' is one of the most important books I’ve read."

Stewart Butterfield: "'Team of Rivals' is among the best historical books I've ever read.

Bless you, Doris Goodwin. Truly excellent."

Included on Jamie Dimon's list of favorite books he sent to JP Morgan summer interns in 2010.

Stewart Butterfield: "The Making of a Manager is an excellent, approachable and comprehensive guide for those making the transition into management.

This is something we'd give out to new managers at Slack and it could very well set a new standard for new managers."

Sam Altman: "At startups, individuals asked to manage are rarely set-up for success. Julie Zhuo gives new managers the tools they need to help their people and company win."

Stewart Butterfield: "One of the most useful books I've ever read on either leadership or management"

Max Levchin: "In a high-growth startup, such conversations can often be very stressful, and it is easy to lose track of your shared end goal when emotions flare up. 

Crucial Conversations covers many of the useful tactics in making sure these conversations are productive, and offers advice on improving relationships with your coworkers."

Stewart Butterfield: "A good book"

Stewart Butterfield: "A landmark. Play Anything is a humane and personal theory of play for the supermodern age.

Full of fascinating insight and fresh perspective, Play Anything shows how play serves as a fundamental tool for examining the world around us."

Stewart Butterfield: "Read Emily Bazelon’s ‘Charged’ last month and it was well-written, persuasive & thoughtful, but illustrating a profoundly disheartening story."

Stewart Butterfield: "Great summer read"

Stewart Butterfield: "Perfect vacation thriller"

Stewart Butterfield: "One of the most useful books I've ever read on either leadership or management"