““Meetings with Cook could be terrifying. He exuded a Zenlike calm and didn’t waste words. “Talk about your numbers. Put your spreadsheet up,” he’d say as he nursed a Mountain Dew. (Some staffers wondered why he wasn’t bouncing off the walls from the caffeine.) When Cook turned the spotlight on someone, he hammered them with questions until he was satisfied. “Why is that?” “What do you mean?” “I don’t understand. Why are you not making it clear?” He was known to ask the same exact question 10 times in a row.””