Browning discusses the fallibility of eyewitness testimony and collective memory in his introduction to "Ordinary Men," but expands the conversation here. In particular, he examines Eichmann's post-arrest testimony, as well as survivor accounts of one minor factory labor camp. He raises important points about using eyewitness accounts like other sources--critically, in conjunction with corroborating evidence--not as an affront to the validity of survivors' memories, but as a way to create relatively accurate histories. Fascinating book.