The most revealing anecdote comes from Tim Cook, who confirmed that he offered to donate part of his liver to the terminally ill Jobs: "Cook decided to undergo a battery of tests that determine if someone is healthy enough to be a living donor." Cook recalls Jobs's angry refusal of his offer: "'No,' he said. 'I'll never let you do that. I'll never do that!'... Steve only yelled at me four or five times during the thirteen years I knew him, and this was one of them."
Walter Isaacson wrote a fully authorised Jobs biography in 2011, and Apple's unusual decision to co-operate with Schlender and Tetzeli perhaps indicates their dissatisfaction with Isaacson's book. Becoming Steve Jobs quotes Tim Cook: "I thought the [Walter] Isaacson book did him a tremendous disservice." In an interview with The New Yorker last month, Jony Ive was equally critical of Isaacson's biography: "My regard couldn't be any lower".