The Devotion of Suspect X (Detective Galileo, #3)

by Keigo Higashino

But maybe, Yasuko thought, enduring that guilt is a way of doing penance.

Confinement was like a limitless garden of paradise for him. How short is a lifetime, he thought, compared to the time it will take humankind to find all the rich veins of mathematical ore where they lie sleeping and tease them forth into the world.

They certainly had no idea what they had done, but that was okay. Sometimes, all you had to do was exist in order to be someone’s savior.