Oh, it's that whole cozy academia aesthetic thing, isn't it? It's less about the actual season in the plot and more about the feeling the cover and description evoke. Dark academia novels like 'The Secret History' get a massive second wind every September, but even new releases are packaged for it. You see a lot of muted, earthy covers with leaves, candles, old libraries. The vibes are thick with tweed, hot tea, and melancholy. It's a mood you can literally hold in your hand, which is perfect for BookTok because it's so visually shareable. A stack of those books with a pumpkin spice candle is basically a video genre now.
I think it taps into a collective nostalgia for going back to school, even if you're years out. That sense of new beginnings mixed with the dread of shorter days. The books pushed are often introspective, a bit gothic, or involve found families in tight-knit settings—stuff that feels right for curling up under a blanket. It’s interesting that it’s not always ‘autumn’ books, but books that feel autumnal. A dark fantasy with a forest setting might get looped in just because of the atmosphere.
Honestly, sometimes it feels a bit manufactured, like publishers are slapping a spooky tree on anything vaguely literary. But when it works, it really works. It creates this immersive, seasonal TBR that makes reading feel like part of a bigger, cozier tradition.