"Le Merveilleux voyage de Nils Holgersson à travers la Suède" by Selma Lagerlöf is a work of fiction originally published in 1906 and 1907. A mischievous boy who delights in tormenting animals captures a tomte and faces magical consequences—he's shrunk to tiny size. Clinging to the neck of his family's goose, Nils embarks on an extraordinary journey across Sweden's provinces with a flock of wild geese, encountering adventures that challenge him to prove his worth and transform his character.
Wikipedia page about this book: en.wikipedia.org/wiki/The_Wonderful_Adventures_of_Nils Wikipedia page about this book: fr.wikipedia.org/wiki/Le_Merveilleux_Voyage_de_Nils_Holgersson_%C3%A0_travers_la_Su%C3%A8de