Brooklyn Hardcore by Eddie McNamara

In 1994 Brooklyn, Jimmy Quinn sat at the top of the street kid food chain. As a promising Golden Gloves boxer and member of The Graveyard Stompers, New York City’s most notorious hardcore punk crew, Quinny forged his own future with determination and shaped it with his fists.
Like the streets he came up in, the soundtrack to his life was loud, fast, and brutal, but with his best friend Skinhead Carlos, girlfriend Justine Obscene, and the boys by his side, he was ready to make Fate his bitch. But Fate is nobody’s bitch. One unlucky punch. One Nazi skinhead who never got back up. The life Quinny had built from junkyard scraps disappeared in an instant.
After two decades in prison, Quinny returns to a different Brooklyn. The gang is gone, hipsters have replaced street punks, and his dream of becoming a pro fighter is as dead as the bonehead who put him here. Or is it? His fists make collecting money for a local mobster his best option—but only until he can parlay his killer reputation into a six-figure pro boxing debut. Can he crawl his way back up in time or will he be just another victim?

"Brooklyn Hardcore viscerally revives a Brooklyn I'd feared was forgotten; one filled with shitkickers and zines and mixtapes. A place where the dirtbags are sometimes your heroes and the degenerates have got your back. When McNamara's characters get dealt shit hands, they make themselves a sandwich. This book is full of heart and heartbreak but make no mistake: there are no victims here. No one goes quietly into the night or cries into their pillows. Brooklyn Hardcore renders a world rarely given space in contemporary fiction: one where, like his unforgettable Quinny, people get knocked down and the only choice is to get the fuck back up. Bruised and battered but standing."
-Xochitil Gonzalez, NYT Bestseller Olga Dies Dreaming