"She and Tiger developed a calm, almost cool relationship in front of other people, and conversations with them tended to be awkward and strained. I never saw them argue, but they weren't openly affectionate either," he said.
After the National Enquirer began publishing stories alleging that Woods had cheated on Elin with dozens of women, Haney said that the Woods' marriage fell apart.
"I sensed a force field up between Tiger and Elin, who didn't speak directly to each other," he writes.
While Woods was typically quiet and hesitant to discuss personal issues with his coach, he shared with Haney some of his feelings about the scandal.
"What I learned is that for the rest of my life I can't have sex with someone unless I genuinely feel something for them. If I do, I'm putting myself in jeopardy," Woods is quoted as saying.
Woods bounced back from the scandal and began competing within weeks, but never at the level he once had, Haney writes.
"No other golfer or athlete has seen more slip through his grasp than Tiger. But the biggest miss of all gives him a chance for the biggest recovery. It's a destiny that would match his greatness," he said.