Books written during Belle Époque, setting in this period or about it.

The Belle Époque or La Belle Époque (French pronunciation: [bɛlepɔk]; French for "Beautiful Era") was a period in European social history that began during the late 19th century and lasted until World War I. It was a period characterised by new technological and medical discoveries and optimisms, occurring during the time of the French Third Republic and the German Empire. The "Belle Époque" was named in retrospect, when it began to be considered a "golden age" in comparison with the trauma of WWI and the previous economic depression.
In the newly rich United States, emerging from the Panic of 1873, the comparable epoch was dubbed the Gilded Age. In the United Kingdom, this epoch overlaps the end of what is called the Victorian Era there and the period named the Edwardian Era.