The Breaker Kuroki Tensai, Sono na wa

is the first volume of the The Breaker light novel series, written by Yagi Uzuki and Illustrated by Nilitsu. It was released under the Dengeki Bunko Imprint in May 2014.

Synopsis
A mysterious man wearing an ugly human face and calling himself a "fearful face" occupies high school with more than 200 students hostage. The man who was called as a negotiator was a boy who was in prison for a felony special prison. The boy's name is Kanata. He was a "devil" who was sentenced to death for killing 64 detectives, as well as being responsible for the poisonous gas terrorism that claimed the lives of one million people. A vicious siege criminal who kills hostages and imposes unnatural demands, and a ruthless demon who finds no value in the lives of others, engage in an intelligent battle ...!

(source: Bookwalker JP - Translated)