Later he gave up science fiction in favour of other narrative forms, in particular the thriller and the historical novel. His first thriller, "The Vermin", contained all of the ingredients of his later suspense novels. In his thrillers he denounces the problems of society, in particular that of the United States. To maintain his creative freedom Brussolo works with several publishers whom he puts in competition with one another, relying on the high sales figures his books achieve. He has also published under the pseudonyms Kitty Doom, D. Morlok, Akira Suzuko and Zeb Chillicothe.