The award-winning crime writer Ken Bruen, called "the best-kept literary secret in Ireland" by the Independent, is as joyously unapologetic in his writing as he is wickedly poetic, mixing high and low with hypnotic mastery. In the previous book in the series, Purgatory, ex-cop Jack Taylor had finally turned his life around, only to be taunted back into fighting Galway's corruption by a twisted serial killer named C33. 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 the University of Galway who has a violent habit his friends in high places are only too happy to ignore. And when Jack rescues a preppy American student on a Rhodes Scholarship from a couple of kid thugs, he also unexpectedly gains a new sidekick, who abandons his thesis on Beckett to write a biography of Galway's most magnetic rogue.

Between pub crawls and violent outbursts, Jack's vengeful plot against the professor soon spirals toward chaos. Enter Emerald, an edgy young Goth who could either be the answer to Jack's problems, or the last ripped stitch in his undoing. Ireland may be known as a "green Eden," but in Jack Taylor's world, the national color has a decidedly lethal sheen.