“It is not so difficult to get Paul McCartney to talk about the past, and this can be a problem. Anyone who has read more than a few interviews with him knows that he has a series of anecdotes, mostly Beatles-related, primed and ready to roll out in situations like these. Pretty good stories, some of them, too. But my goal is to guide McCartney to some less manicured memories—in part because I hope they'll be fascinating in themselves, but also because I hope that if I can lure him off the most well-beaten tracks, that might prod him to genuinely think about, and reflect upon, his life.

And so that is how—and why—we spend most of the next hour talking about killing frogs, taking acid, and the pros and cons of drilling holes in one's skull.”