Gladwell's fourth book comprises various contributions to the New Yorker and makes for an intriguing and often hilarious look at the hidden extraordinary. He wonders what… hair dye tell[s] us about twentieth century history, and observes firsthand dog whisperer Cesar Millan's uncanny ability to understand and be understood by his pack. Gladwell pulls double duty as author and narrator; while his delivery isn't the most dramatic or commanding, the material is frequently astonishing, and his reading is clear, heartfelt, and makes for genuinely pleasurable listening