The awards keep rolling in for Professor John Lewis Gaddis’s biography of American statesman George Kennan.

The book, titled “George F. Kennan: An American Life,” was named the winner of the National Book Critics Circle Award for biography late last week, the New York Times reported. The biography has already won the American History Book Prize, which earned Gaddis $50,000 and the title of American Historian Laureate.

The National Book Critics Circle, founded in 1974, honors the “best literature published in English” in its annual awards. Prizes are awarded in six categories: autobiography, biography, fiction, nonfiction, criticism, and poetry. In winning the biography prize, Gaddis beat out contenders from Harvard, Penn and Columbia.

“George F. Kennan: An American Life” was shortlisted for the Lionel Gerber Prize, an award presented by the University of Toronto, Foreign Policy magazine and the Lionel Gerber Foundation to the year’s best nonfiction book about foreign affairs.