Critique of Pure Reason
Book
Immanuel Kant's seminal work on metaphysics and epistemology, which Schopenhauer engaged with significantly.
Mentioned in 2 videos
Videos Mentioning Critique of Pure Reason

Michael Schur — Lessons from "The Office" and SNL, Moral Philosophy, Storytelling, and More
Tim Ferriss
Immanuel Kant's philosophical work, described as dense and unenjoyable to read for the average person.

The Wisdom of a Pessimist - Arthur Schopenhauer
Academy of Ideas
Immanuel Kant's seminal work on metaphysics and epistemology, which Schopenhauer engaged with significantly.