Used book – Les Racines du mal, Maurice G. Dantec

"Andreas Schaltzmann started killing because his stomach was rotting. The phenomenon was far from isolated: cosmic waves emitted by Aliens had long been shifting his organs around, ever since the Nazis and the inhabitants of Vega had moved into his neighborhood." Andreas is a killer and he knows it, but when people try to pin crimes he didn't commit on him, he screams from the depths of his clinic.