A review by being_b
Codex by Lev Grossman

4.0

Similar in atmosphere and arc to [b: Night Film|18770398|Night Film|Marisha Pessl|https://images.gr-assets.com/books/1397425352s/18770398.jpg|15182838] by Marisha Pessl: the protagonist takes an obsessive dive into an obscure topic, has a potential nervous breakdown, and questions the nature of reality. I have the feeling this book got sunk by its own marketing:

Spoiler

It works much better if you don't expect any fantastic elements.