4.0

This is basically a compendium of interview notes from his podcast, sprinkled with some other material. Sometimes Tim's stuff can veer a little douchey or woo, and there's some of that, but mostly it's just a distillation of what interesting people had to say. There are a lot of references to other works (books, in particular), so this will spin up your ADHD if you're susceptible (as I am). I really liked that aspect of it though, and also that you can pretty much just drop into the book anywhere w/o context and read some new person's interesting thoughts.