After serving his sentence , he was sent to Sachsenhausen concentration camp . While at Sachenhausen , Absagen and other prisoners , including Bernhard Bästlein , held cultural and literary gatherings . As the Nazis began to deport more Jews after Kristallnacht , they plundered their books and brought them to the concentration camps . In 1936-1937 , the Sachsenhausen library had 500 books and two years later , 800 books . Beginning in 1936 , Bästlein and Volker Paddry recited poetry and prose they had learned by heart and Abshagen held programs on proletarian and progressive writings . These programs strengthened the spirit of those who attended , who then lifted the spirit of those who had n't and thus , the prisoners remained unbroken by their circumstances
Kristallnacht
Kristallnacht
Robert Abshagen