Alchemy - Rory Sutherland. Written by an advertising executive, it's filled with little gems, especially about signaling. Honorable mention to The Elements of

Alchemy - Rory Sutherland. Written by an advertising executive, it's filled with little gems, especially about signaling. Honorable mention to The Elements of Eloquence - Mark Forsyth, which is a delightfully light read about the patterns in English phrases, but I finished it 2 days before the start of 2020.