"There Is No Antimemetics Division" by Sam Hughes

This book was an absolute gem hidden in plain sight. I first learned about it from a funny meme on the Internet, and then got fully immersed in the story.

The premise is simple: there's an SCP-like foundation with a division that handles entities that mess with your memories of them (mostly, wiping them). So how do you combat or contain what you can't remember?

The book started well with mind-boggling concepts, but toward the end, it became completely incomprehensible, with humanity winning by, virtually, magic. I wish I could see more of the world, but I guess I can read the SCP wiki or something.

Solid book, don't expect much from the ending.