My newsletter: https://simonowens.substack.com/   I’m sure just about everybody has had the experience of looking at a celebrity memoir and wondering: did they actually write that? In many cases, they didn’t, at least not by themselves. There’s actually an entire shadow economy of ghost writers who do the bulk of the work on these books – not just for celebrities, but all kinds of public figures ranging from big-name CEOs to politicians.   But how does one go about hiring a ghost writer? And what’s it like to work with one? To answer these questions, I turned to Dan Gerstein, the founder of Gotham Ghostwriters, an agency that specializes in connecting clients to professional ghostwriters.