(Viz Media) Considered a masterpiece by Naoki Urasawa. A brilliant Japanese brain surgeon in post-Cold War Germany saves the life of a young boy, only to discover years later that the boy grew up to become a serial killer. This is a slow-burn, 18-volume thriller about morality, trauma, and the banality of evil. If you liked True Detective season one, read this.
This article provides both because the medium matters.
If you want to understand the foundations of modern pop culture, start here. : A cyberpunk landmark that influenced global sci-fi.