"In the new novel Green Hell, Bruen's dark angel of a protagonist has again hit rock bottom: one of his best friends is dead, the other has stopped speaking to him; he has given up battling his addiction to alcohol and pills; and his firing from the Irish national police, the Guards, is ancient history. But Jack isn't about to embark on a self-improvement plan. Instead, he has taken up a vigilante case against a respected professor of literature at...