Book no. 2: De ooggetuige (the eyewitness), by Ernst Weiss. Revised translation by Frank Schuitemaker.
Told from the perspective of a psychiatrist who after World War I treats a certain Corporal A.H. for hysterical blindness. He later gets into big trouble, having kept notes of his analysis of the patient. And starts to wonder if curing him was such a good thing.
Surprisingly, this was written in 1938.