The Disappearance of Josef Mengele: A Novel

I had initially thought this was a fictional work. The "a novel" subtitle was misleading. This is a mostly factual work about the life of Josef Mengele in South America after World War II. He comes across as a mostly sympathetic old man. He is living a new life in South America. When questioned about past experiences, he talked about just doing his duty. He sees the work he did in concentration camps as work to "help" allow the most people to live. (Very little is discussed about the actual work he did.) However, just when you are feeling sympathetic, he lets an anti-Semitic rant out that lets you realize he might not be as innocent as he comes across. He is rather successful in medical and business endeavors, but has to flee to Paraguay and assume a false identity when the Nazi hunters start tracking him. He dies a rather anonymous death. He continues to be hunted down before people get proof that he is actually dead.