The Cass McCombs’ anthology, A Folk Set Apart, is subtitled “Rarities, B-Sides & Space Junk, Etc.” which is, on the surface, true but it’s so much more than that. It’s an alternate retelling of the last decade and a half of an enigmatic career built on immaculate songwriting but short on “breakthrough success.” While it contains none of McCombs’ better known songs from his seven full-lengths, he would have you believe this is his favorite album.