Books with a fall/autumn vibe

Hi, I would like recommendations for book to read that have that fall vibe. I don't want book that look like fanfictions, and I would prefer it to not have superficial romance like "he/she was the most beautiful" or "her smile was beautiful". I wanted something fresh. Unhinged, with a cool girl character, maybe some mystery and action, discovering something or solving something. But I want something light, I don't want Horror or classics, nor about murders. Something that reminds you of Luna lovegod from Harry Potter.