He was the first American president to pen and sell his memoirs for a large sum.
John Adams
Thomas Jefferson
Ulysses S. Grant
Theodore Roosevelt
Dwight D. Eisenhower
Ulysses S. Grant, dying of throat cancer, sold his memoirs to a publishing house in order to leave adequate funds to his family. He died just days after completing them. One of the partners of the publishing house, Mark Twain, assisted him.