When Soundgarden frontman Chris Cornell died by suicide nearly a decade ago, nobody saw it coming. That includes his bandmate, guitarist Kim Thayil , who’d known Cornell since the early Eighties. In Thayil’s upcoming memoir , A Screaming Life: Into the Superunknown with Soundgarden and Beyond , the guitarist reflects on his contributions to one of rock’s most innovative bands, what it was like being caught up in the middle of grunge mania, and his friendship with Cornell. He also opens up about