Sponsor message: I recently got a subscription to 12min, a library of condensed non-fiction books (audio and text). New titles are added all the time. I’ve found it especially useful to refresh my memory on books I read years ago, like Richard Dawkins’ The Selfish Gene, Yuval Noah Harari’s Sapiens, Nassim Nicholas Taleb’s Fooled By Randomness, and Tim Ferriss’s Tools of Titans. A lifetime subscription to 12min is $39. -- Mark