Well, it depends whether you want to lean into fading light/seasons of mists and mellow fruitfulness etc, or the reverse.
For the first, I would suggest Bowen's The Last September, Alain Fournier's Le Grand Meaulnes, Olga Tokarczuk's The Empusium, Edith Wharton's The Age of Innocence or The House of Mirth, Ali Smith's Autumn, Donna Tartt's The Secret History, Daphne Du Maurier's My Cousin Rachel, John Updike's The Witches of Eastwick, and The Thousand Autumns of Jacob de Zoet by David Mitchell.