Books Kafka would be proud of

Kafka once wrote in a letter that he thought we ought to read only the books that wound or stab us. The quote is longer (because it's German), but I think we all get the drift.

This thread was inspired by a question that @scituselectrum asked me in the last book-reading thread: what books have you read that have allowed you to see the world in a new light? Put in Kafka-esque terms, what books have impacted you like a disaster and acted as an axe for the frozen sea within you?

I thought it was such a good question that I wanted to know other answers. Maybe add some reading to my already intimidating list.