German book club founded 1924 in Berlin. After WWII, the club went to Darmstadt, Germany. In 1970, 50% was sold to Bertelsmann AG, which acquired the rest in 1988.
For other German Club editions please check:
Bertelsmann Club
Bertelsmann Schallplattenring
label
Sonocord
SR International
Deutscher Schallplattenclub
for Austria
Donauland