86--EIGHTY-SIX, Vol. 4 (light novel): Under Pressure (86--EIGHTY-SIX (light novel), 4)

What Makes a Monster? "Come find me." Legion developer Zelene Birkenbaum, a figure shrouded in mystery, has left the Eighty-Sixth Strike Package a trail of bread crumbs leading all the way to the frozen north. But as Shin and the Eighty-Six acquaint themselves with the United Kingdom of Roa Gracia, they learn of an anti-Legion strategy that chills them worse than the cold. Here on this new battlefield, surrounded by mechanical ghosts that exist only to fulfill their duty, the Eighty-Six are forced to acknowledge an unsettling truth...