Pius XII, The Holocaust, and the Cold War is a 2008 book by historian Michael Phayer which makes use of many new documents that have recently come to light due to Bill Clinton's 1997 executive order declassifying wartime and postwar documents.
The new documents were stored at the US National Archives and Holocaust Memorial Museum, including both diplomatic correspondence, American espionage, and even decryptions of German communications), new documents released by the Argentine government and the British Foreign Office, and the diary of Bishop Joseph Patrick Hurley
In particular, these documents reveal new information about Pius XII's actions regarding the Ustaše regime, the genocides in Poland, the finances of the wartime church, the deportation of the Roman Jews, and the postwar "ratlines" for Nazis and fascists fleeing Europe.[1]
According to Phayer, "the face of Pope Pius that we see in these documents is not the same face we see in the eleven volumes the Vatican published of World War II documents, a collection which, though valuable, is nonetheless critically flawed because of its many omissions".[2]