Wikipedia page about this book: https://en.wikipedia.org/wiki/Le_Grand_Meaulnes

Release date is 2004-05-01

Walter Debeuf, updated by Laurent Vogel (using images
generously made available by the Bibliothèque nationale de
France (BnF/Gallica) at http://gallica.bnf.fr)

"Le Grand Meaulnes" by Alain-Fournier is a novel published in 1913. Fifteen-year-old François narrates the story of his friendship with the heroic Augustin Meaulnes, who stumbles upon a mysterious château and an enchanting girl at a costume party. After returning to school, Meaulnes becomes obsessed with finding both the lost estate and his dream girl, Yvonne de Galais. This romantic tale explores the search for the unobtainable and the elusive passage between childhood and adulthood in rural France. (This is an automatically generated summary.)

Original publication data not identified