The Boys from Brazil is a 1976 thriller novel by American writer Ira Levin. It was made into a film of the same title that was released in 1978.
Yakov Liebermann is a Nazi hunter (loosely based on Simon Wiesenthal) who runs a center in Vienna that documents crimes against humanity, perpetrated during the Holocaust. The waning interest of the Western nations in tracking down Nazi criminals, and the failure of the bank where he kept his center's funds, has forced him to move the center to his own lodgings.
Then, in September 1974, Liebermann receives a phone call from a young man in Brazil who claims he has just finished tape recording a meeting held by the so-called "Angel of Death", Dr. Josef Mengele, a concentration camp medical doctor who performed horrific experiments on camp victims during World War II. According to the young man, Mengele is activating the ODESSA for a strange assignment: sending out six Nazis (former SS off