Adult book that feels like reading A Series of Unfortunate Events or Harry Potter as a kid

Essentially the title — I am a millennial woman having an early-onset mid-life crisis and I am seeking nostalgia and simple joys. As a kid, A Series of Unfortunate Events and Harry Potter had me in an absolute chokehold and I would love to recreate that feeling.

Please send any and all recs that recreate that feeling for adults. Please don’t send me to the YA section at the bookstore (no hate as I am not ashamed to go there typically, I just want to believe grown ups have fun too)!