Tim Ferriss has been listed as one of Fast Company's "Most Innovative Business People" and one of Fortune's "40 under 40."

He is an early-stage technology investor/advisor (Uber, Facebook, Shopify, Duolingo, Alibaba, and 50+ others) and the author of four #1 New York Times and Wall Street Journal bestsellers, including The 4-Hour Workweek and Tools of Titans: The Tactics, Routines, and Habits of Billionaires, Icons, and World-Class Performers.

The Observer and other media have called Tim "the Oprah of audio" due to the influence of The Tim Ferriss Show podcast, which is the first business/interview podcast to exceed 100 million downloads.

Stephen Hawking is regarded as one of the most brilliant theoretical physicists since Einstein. He held the position of Lucasian Professor of Mathematics at the University of Cambridge for thirty years and was the author of A Brief History of Time which was an international bestseller.

His many publications include The Large Scale Structure of Spacetime with G F R Ellis, General Relativity: An Einstein Centenary Survey, with W Israel, and 300 Years of Gravitation, with W Israel.

Among the popular books Stephen Hawking has published are his best seller A Brief History of Time, Black Holes and Baby Universes and Other Essays, The Universe in a Nutshell, The Grand Design and My Brief History.

His other books for the general reader include A Briefer History of Time, the essay collection Black Holes and Baby Universe and The Universe In A Nutshell.

Stephen Hawking died in March 2018.