Ezra Lieberman is a fictional character from the novel "The Boys from Brazil" by Ira Levin. He is a Jewish Nazi hunter who is dedicated to tracking down former Nazi officials who escaped justice after World War II. Lieberman is portrayed as a determined and resourceful individual, driven by a strong sense of morality and justice. In the story, Lieberman uncovers a sinister plot involving Dr. Josef Mengele, a notorious Nazi doctor. As he investigates, he faces numerous challenges and dangers, showcasing his bravery and commitment to exposing the truth about the atrocities committed during the Holocaust.