Super Short Summary

Diary of an Oxygen Thief by Anonymous follows an unnamed Irish advertising executive in London who recounts his destructive relationships with women, whom he subjects to psychological trauma for amusement. After spiraling into alcoholism, he enters AA, finds stability but becomes disillusioned, and meets Aisling, who ultimately enacts his karmic retribution. The narrator's retrospective account reflects his narcissism and paranoia, complicating the narrative's reliability. The novel includes themes of psychological abuse, alcoholism, and violence.