What the Dog Saw by Malcolm Gladwell.
I don’t really like his pop psychology books, but I LOVE this book, which is basically a collection of the best/favorite articles that he wrote for the New Yorker. You will find yourself fascinated by the development of advertisements for hair dye and training dogs. It’s also very, very well written, obviously.
If you don’t want to spend on it or shlep to the library all of his articles (including many more than are in the book) are on his website, but the computer is an annoying way to read.