George W. Bush – $40 million

George W. Bush concluded his term as the 43rd President of the U.S. in 2009. As a member of the Republican Party, he previously held the office of governor in Texas. His father, George H. W. Bush, also served as President of the U.S. Outside of politics, he co-owned the Arlington-based Texas Rangers.

In less than two months following its release, his 2010 memoir titled Decision Points sold two million copies. He also picked up painting and has worked on portraits of leaders like Tony Blair and Vladimir Putin. His wife, Laura Welch, accompanied him to Joe Biden’s 2021 inauguration ceremony.