When you think of the early days of punk rock, maybe you think of London and the Sex Pistols and the Clash; or New York and the Ramones and the New York Dolls. But Los Angeles also had a homegrown and influential punk scene. The LA sound was harder and thrashier, developed by bands like Black Flag. Keith Morris was the first lead singer and a co-founder of Black Flag. He also went on to create the Circle Jerks and his latest band, Off! Now he’s written an autobiography about his years toiling in the punk trenches. It’s titled “My Damage: The Story of a Punk Rock Survivor.”