A year or so ago, browsing in a bookshop, I came across a shelf dedicated to “Smart thinking”. I had never seen this term used to describe a category of books before yet I instantly knew what it meant. Its elevation to official bookseller’s category is confirmed by the appearance of “Psychology/Smart Thinking” on the back jacket of Gary Klein’s new book, Seeing What Others Don’t, and by Penguin’s launch of its “Think Smarter” e-newsletter…