The former president now says he has received multiple book deals and is "writing like crazy."
"I turned down two book deals, from the most unlikely of publishers, in that I do not want to do such a deal right now. I'm writing like crazy anyway, however, and when the time comes, you'll see the book of all books," Trump promised in a statement emailed to reporters.
"Actually, I've been working on a much more important project right now!" the former reality TV star said cryptically.