In 1930 he met Ellen Kroner with whom he worked closely and married her in 1939.
Following the Nazi seizure of power in 1933, Otten first went to Spain and fought in the Spanish Revolution. Following its defeat he went to London, where he wrote 120 radio broadcasts for the BBC.[2] He went blind in 1944[2] and later moved to Switzerland.[2]
^Ehrenstein, Albert (2004). Aufsätze und Essays. Gottingen: Wallstein Verlag.
^ abcRitchie, J. M. (1993). "Expressionism in Exile". In Behr, Shulamith; Fanning, David; Jarman, Douglas (eds.). Expressionism Reassessed. Manchester: Manchester University Press.