If you have an unprotected (DRM-free) EPUB file on your computer, follow these steps:
So why keep reading?
, while equally brilliant, introduces the concept of the "cog" —the idea that every individual has inherent value in the clockwork of the world. He eventually breaks the case not just through science, but by understanding the one thing Ishigami's math cannot account for: the burden of guilt that a "warm heart" carries.