While promoting his next book, Donald Trump said that he will prove how Queen Elizabeth II, Lady Diana, Richard Nixon, Oprah Winfrey, Hillary Clinton and other people "kissed my ass" (an expression that means being polite with someone to please or get something from them).
The correspondence to be released by the former US president consists of 150 messages to famous figures, including Kim Jong-un and Ronald Reagan.
"I think they're going to see a very fascinating life," Trump told Breitbart News. "I knew them all - and every one of them licked me, and now only half of them lick me."
His son, Donald Trump Jr., said his father interacted with "some of the most interesting people in the world," but "it's amazing how quickly their adoration for him changed when he ran for office as a Republican. "The letters to Trump tell you exactly what they thought of him and how false their contempt for him really is."
The book is titled "Letters to Trump" and will sell for $99, or $399 with his signature.
