Aron Menczer (1917-1943) was an active member of the Zionist youth movement Gordonya. After the annexation of Austria by Nazi Germany in March 1938, he became deeply involved in the efforts of the Youth Aliyah to enable Jewish youngsters to emigrate from Austria to Palestine. Menczer postponed his own Aliyah in order to continue to work for the exit of Jewish youth from Nazi Austria, and became in September 1939 the director of the Youth Aliyah in Vienna. His absolute devotion to the emigration efforts and to the educational work with the remaining Jewish youngsters in Vienna made him their recognized leader. Menczer was deported to Ghetto Theresienstadt in September 1942, where he continued his educational work. In October 1943 he was transported to Birkenau with a group of 1196 children, who were brought to Theresienstadt from Bialistok, and with 52 adults who, like him, volunteered to take care of them. They were all murdered there. The personality and deeds of Aron Menczer are the center of the book. A couple of chapters deal with the historical background: the Nazi policy of pressuring Jews to exit the country, prior to the phase of deportation and murder, and the efforts by the Youth Aliyah and other organizations to rescue them. The book is based on the original German version edited by Joanna Nittenberg und Benjamin Kaufmann. Two new parts were added to the current Hebrew version, edited by Jacob (Kobi) Metzer. One is a comprehensive introduction which examines Menczer’s activity in light of some general issues raised in the research literature. The other part consists of archival sources which were added to the book for additional insights.