Washington, D.C. ? President Barack Obama and his wife, Michelle, millionaires from his best-selling books, made $2.7 million last year and paid just under one-third of their adjusted income in federal taxes.

While the income, mostly his, was far more than the U.S. median household income of about $50,000, it was quite a decrease from the $4.2 million the Obamas made in 2007.

Both years, nearly all of the earnings came from Obama’s best-selling books. “Dreams from My Father” and “The Audacity of Hope” brought in about $2.5 million in royalties last year, according to copies of the returns released by the White House on Wednesday, the federal filing deadline.

Obama earned $139,204 as a Democratic senator from Illinois last year before leaving his seat after winning the November election. Michelle Obama received a salary of $62,709 from the University of Chicago Hospitals, where she was an executive.

The couple’s total federal tax came to $855,323. That was 32 percent of their adjusted gross income of $2,656,902.