A new book about Trump, reportedly written by Maggie Haberman, among others, reveals that Trump compared himself to historical figures such as Mao and Stalin, with some outlets also mentioning Attila the Hun. The book appears to contain various anecdotes and insights into Trump's presidency, including his views on power and his behavior in the White House. The exact details and focus of the book are not entirely clear, but it seems to offer a behind-the-scenes look at Trump's time in office.