Ezra Furman is a songwriter who lives in Somerville. Over the course of a varied career since 2006, she has been backed by several fiery rock'n'roll bands, released (at least) eight LPs, and always kept up the practice of playing intimate, searing solo shows with just her voice and guitar and an arsenal of great original songs. Each Tuesday in January at Somerville's ONCE she will give us a glimpse of where she, an ever-evolving artist, has been and is yet to go, airing new work alongside old favorites.