One that I haven't seen mentioned is "The hidden persuaders" by Vance Packard. It's old and some say it's exaggerated in parts, but some of the mechanisms and tricks explained are everywhere. We swim in a sea of marketing.

Practical effect: you'll start seeing your favourite cereals as an entirely indistinct product, with a cardboard box around, with coloured print over it which has no connection whatsoever with the content.