Perfidy is a book written by Ben Hecht in 1961. The book details the events surrounding the Rudolf Kastner trial.
The book draws heavily on transcripts from the trial, and draws the conclusion that Kastner collaborated with the Nazis and then later lied about it under oath. One of the supporting facts presented is that, in the Supreme Court appeal of the original verdict implicating Kastner, all five Supreme Court Judges upheld Judge Halevi's verdict on the "criminal and perjurious way" in which Kastner after the war had saved Nazi war criminal Kurt Becher.[1] Judge Silberg summed up the Supreme Court finding on this point: "Greenwald has proven beyond any reasonable doubt this grave charge."[2]
The book has been denounced by the Israeli establishment.[3]