I kinda feel like I’m dunking on @Marty Bent by reading all of your suggestions

nexus by ramez naam

👀

Fountain

Mysteries of the Bitcoin Citadel • Listen on Fountain

When Lauren and Ellie inherit their late uncle’s cabin, they uncover more than family secrets. Discovering a hidden world built on buried clues, ...

A niece drives north to sign papers and sell her uncle’s crumbling lakeside lodge. What she finds is a fortress-walls lined with puzzles, ledgers, and whispers that maybe Ted didn’t build it to protect his fortune… but to test whoever came next.