The Drinker was begun in 1944 when Hans Fallada was imprisoned in a criminal asylum for the attempted murder of his wife. Author of two previous novels, his third, The Drinker, is autobiographical and tells the story, in diary form, of a man driven by the demons of morphine and alcohol.
Maybe I am a little bit slow on the uptake but I do not understand the passage in bold. The passage does not make sense to me. The subject "author of two previous novels" has no predicate. It seems to as if this part is cut off.