Wikipedia page about this book: https://es.wikipedia.org/wiki/La_inc%C3%B3gnita

Release date is 2017-04-10

Produced by Josep Cols Canals, Ramon Pajares Box, and the
Distributed Proofreading team at DP-test Italia.

"La Incógnita" by Benito Pérez Galdós is a novel published in 1889. Told through letters from Manuel Infante to a mysterious correspondent, the story follows Infante as he arrives in Madrid as a new deputy and becomes entangled in the lives of Francisco Viera, Tomás Orozco, and Orozco's wife Augusta. When Infante falls for a married woman and a friend dies under unclear circumstances, he confronts troubling questions: Was he rejected out of virtue or rivalry? Was the death suicide or murder? (This is an automatically generated summary.)

Original publication data not identified