Belzec, Sobibor, Treblinka" . . . Mr. Arad reports as a controlled and effective witness for the prosecution. . . . Mr. Arad's book, with its abundance of horrifying detail, reminds us of how far we have to go."New York Times Book Review " . . . some of the most gripping chapters I have ever read. . . . the authentic, exhaustive, definitive account of the least known death camps of the Nazi era." Raul Hilberg Arad, historian and principal prosecution witness at the Israeli