John Constantine, Hellblazer Vol. 5: Dangerous Habits (New Edition) : Paperback : DC Comics : 9781401238025 : 1401238025 : 21 May 2013 : As a sorcerer literally haunted by the demons of his past, John Constantine\'s is no stranger to mystic supernatural horror. But it\'s his chain-smoking that ultimately brings death to Constantine\'s front door. John Constantine has lung cancer. Though condemned to hell, Constantine continues to laugh in the face of this all-too-serious world.