Prince Harry is rumored to be working on a new copy of his memoir, Spare, but the Duke of Sussex might not have enough anecdotes to add. According to a source, the book publisher is looking for “more sensational material” to include in the special edition copy. Spare hit shelves in 2023, and since its release, there have been allegations of a follow-up project being released, but 18 months later, there has yet to be a second iteration of it. OK! previously reported an insider claimed Harry was working on content to include in newer copies of the autobiography. “Prince Harry is already planning…