that crazy doctor Mengle a.k.a the angel of death, crazy guy. he really had an obession espeacially with twins. know i really ger why such an obsession over them. some people can be such wierdos. he killed a lot of inoccent people just to do those dumb test. why din't he run a test on himslef instead of children. he had no pitty what a shame. im glad hes not alive right now who know what else he could have done! chapter 9 was on eof my favorite chapters because it described how badly the were treated and because of crazy Dr.Mengle.