“The bolt clanged, and the checkpoint gate doors flew apart. I paused for a second on the way out. He looked around and saw that eight years of captivity remained behind him. Almost three thousand identical mucky days filled with dirt and stink. There probably wasn’t a single one among them when I, waking up in the morning, didn’t vow to find out who was supposed to trample the zone instead of me. Which of the four? I knew one thing for sure, no matter how much they tried to convince me otherwise: I didn’t kill...”