The book?The Subtle Art of Not Giving a [Bleep]by Mark Manson. Despite the title, the book is not about NOT caring; rather, it’s about caring less about the small stuff -- and caring more about the things that really matter.
“The girls [on the team] were laughing at me whenever I was reading that, like, ‘You are just so nonchalant about everything now,’” Biles toldNew York Magazine. “Like, ‘This is so nice. How do you do that?’ I said, ‘Just read the book. You’ll learn.’” (Prevention)