Decades before he became the most powerful man on Earth, former (and likely future) President Donald Trump was an influential person, popular with reporters and celebrities alike. A new book, “Letters to Trump,” published by Winning Team Publishing, provides a lively look at what famous people were saying to him as Mr. Trump soared, gliding from successful businessman to star of “Celebrity Apprentice” to his time as head of state. This volume is a natural follow-up to the collection of photos from Mr. Trump’s presidency, “Our Journey Together.” It is likely to top the bestseller list soon.