The current iteration of The Mountain Goats embodies the second act of principal member John Darnielle's indie-rock career — which is to say, Darnielle has fully rounded out his sound in studio and on stage, a far cry from his lo-fi beginnings. His music is centered mostly on concepts: He uses lyrical elements such as personal stories, Bible verses, and recurring characters to give the numerous Mountain Goat albums their focus. Last performing here at the Brooklyn Bowl in 2019 — almost 30 years after the band started — they're back at the more intimate 24 Oxford at the Virgin Hotel. Bonus: Crain Finn of The Hold Steady is an opening act, which really sweetens the deal for indie and literary rock heads.