The story is titled "Ein Mann ohne Namen" ("A Man that has no name". The author is "G.SCHMIDT". It's a dystopian crime novel about a schizophrenic teenager in Australia, 2016, after Germany won world war two.
The main character wears a mask that covers the lower half of his face, for the cover I'd like it to show his face. He has long black hair and pale skin. Brown eyes also. The mask looks like these: http://www.museumreplicas.com/p-2109-vented-breathilator.aspx