'A lovely, erudite exploration of what it is that makes us human' Independent on Sunday.
'An inspiring read that gives lie to the old saying that ignorance is bliss' Good Book Guide.
'Leslie [...] writes convincingly [...] about the human need and desire to learn deeply and develop expertise' Wall Street Journal.
'Timely and readable' Guardian.
'Stuffed with facts, ideas, questions, quotes, musings, findings, puzzles, mysteries, and stories, this is a book - as Montaigne said of travel - with which to 'rub and polish'one's brain. It's the most delightful thing I've read about the mind in quite some time' New York Times.