Three sentences: https://www.samuelthomasdavies.com/book-summaries/business/d... I think the author himself has a one page blog post summarizing it as well.

I agree with him about the smartphone cancer that has crept into all our lives though I imagine there will be much worse distractions in the near future like deep learning phones that can tell us everything going on in a room the moment we enter it (since everybody else also has the same device). Permanent HUD like a James Cameron scifi