Walter Isaacson has done the authorized biography of Jobs, were at first he didn’t know Job’s health condition that’s why he asked prior to his passing why he had agreed to participate:
In order to mask my emotion, I asked the one question that was still puzzling me: Why had he been so eager, during close to 50 interviews and conversations over the course of two years, to open up so much for a book when he was usually so private? “I wanted my kids to know me,” he said. “I wasn’t always there for them, and I wanted them to know why and to understand what I did.
Jobs passed away last October 5th from pancreatic cancer.
Amazon.com listings of Steve Jobs Biography by Walter Isaacson: