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

by Keigo Higashino

She used to be a hostess at a nightclub, after all. There have to be some men in her life.” “An interesting assumption. I can hear the uproar from hostesses across the country already,” Yukawa said with a grin.

“Hey, Teach, aren’t there universities that don’t require a math test to get in?” one of the students was saying. “Why should us guys who are going to those schools have to pass math?”

“What good’s differential and integral calculus gonna do me? It’s a waste of time.”

A feeling rose inside him, making him queasy, as though an elaborate formula he’d thought was perfect was now giving false results because of an unpredictable variable.