Recovering from the severe mental and physical wounds inflicted from his recent past, Jack Taylor has finally found a modicum of peace. He has managed to kick the myriad substances that have had a stranglehold over his painful life. Yet this fragile existence is threatened when a vigilante killer begins targeting the scum of Galway, signing mysterious notes with the moniker 'C 33'. The killer addresses these cryptic letters to Jack, trying to goad the former cop into joining the murderous spree and to help cleanse Galway. While Jack must unravel who this demented killer is, he is also brought into the fold of an enigmatic tech billionaire who has been buying up massive amounts of property in Galway, seemingly in the hopes of offering this downtrodden city a better future. Yet if Jack has learned one thing living in Ireland, it's that people who outwardly claim to be on the side of righteousness are likely harboring far more nefarious motives beneath the surface. With the help of his friends, former dealer-turned-zen master Stewart and dogged police sergeant Ridge, Jack is determined to track down C 33, even if it jeopardizing his livelihood, his friends, and even the remaining shreds of his own sanity. C 33 is Bruen at his best: lyrical, brutal, and ceaselessly suspenseful.