"Without Dogma: A Novel of Modern Poland" by Henryk Sienkiewicz is a novel published in 1891. Leon Płoszowski, a wealthy aristocrat, keeps a diary chronicling his search for meaning in a world he sees as morally adrift. When he falls for the innocent Anielka, his inability to commit drives him into the arms of another woman, setting off a chain of events with devastating consequences. This controversial work became unexpectedly popular among the very decadent youth Sienkiewicz intended to condemn. (This is an automatically generated summary.)
These books are free to read. Each is in the public domain in the United States; check your own country's rules before you copy or share one.