On Thursday, the White House released information about President Barack Obama and First Lady Michelle Obama’s 2013 assets.

According to the financial disclosure form, the Obamas earned a fair amount in royalties in 2013 from the three books that the president has authored. His most popular book last year, “Dreams From My Father,” produced between $50,001 and $100,000 in royalties.

“Dreams From My Father” performed best in 2008, when then-Senator Barack Obama was campaigning for president. According to The Washington Post, the book earned the president nearly $1 million that year.

The Obamas own treasury notes totaling between $1 million and $5 million. Also included in their assets is a 529 college savings plan for their two daughters that contains between $200,000 and $400,000.

In other White House news, President Obama and Vice President Joe Biden reportedly ate lunch at Shake Shack on Friday, inviting several workers from a multi-million dollar reconstruction project taking place in the capital’s NoMa district to dine with them. The president took the opportunity to push for an increase in the federal minimum wage, citing Shake Shack “which has great burgers and pays its employees over 10 bucks an hour.”