Hero of the Underworld by Jimmy Boyle
After ten hard years inside, Hero is out. Released into a mystifying and dangerous world of spivs, crooks, bad jobs and lousy accommodation, he slowly starts to fight back. Hero leads a gang of ex-mental hospital patients - Lockjaw, Bonecrusher and Sligo - in a stand against the might of the underworld. His outlandish plans to thwart his persecutors escalate from stealing a prize bull, to grand theft, and on to the most dangerous heist in town. By the end Hero will either be free at last, or six feet under... Hero of the Underworld is a darkly humorous, uplifting tale of redemption, and of getting even in the strangest way imaginable.