Who Paid the Piper? The CIA and the Cultural Cold War (U.S. title The Cultural Cold War: The CIA and the World of Arts and Letters) is a 1999 book by Frances Stonor Saunders. The book discusses the mid-20th century Central Intelligence Agency efforts to infiltrate and co-opt artistic movements in order to combat political influence from the Soviet Union and expand American political influence, with much funding going through the Congress for Cultural Freedom. In Dissent Jeffrey C. Isaac wrote that the book is a "widely discussed retrospective on post-Second World War liberalism that raises important questions about the relationships between intellectuals and political power."
The British edition, titled, Who Paid the Piper? The CIA and the Cultural Cold War was published in 1999 by Granta (London). The American edition, titled The Cultural Cold War: The CIA and the World of Arts and Letters, was published in 2000 by The New Press.Josef Joffe, in a book review written for The New York Times, described the American title as being "more neutral". Paul Roazen, in The Sewanee Review, described the British title as being "more provocative".
Saunders concluded that the activities of the U.S. were equivalent with those of the Soviet Union.
Mary Carroll of Booklist described the book as having a "European point of view". William and Hilda Baumol, in their book review, wrote that Saunders "generally avoids explicit judgments, seeking to be dispassionate in her account." James Gow of King's College, London stated that Saunders had a negative tone towards the CIA activities and a "churlish attitude".
The book received media attention after its 1999 release, and The New York Times, Organization of American Historians 2000, Arthur Schlesinger Jr., and other former CCF participants focused attention on the book after its American release. Left-wing publications such as Monthly Review and The Nation gave the book a positive reception, while right-wing publications such as The American Spectator and National Interest gave the book a negative reception. The book won the Guardian First Book Award.