All-instrumental ambient post-rockers Russian Circles return with this stirring follow-up to 2006's Enter. Featuring These Arms Are Snakes' Brian Cook on bass, this Chicago-born trio displays a broadened complexity that results in a softer, less urgent vibe than their former material. With the hopeful, ethereal passages of "Campaign" on the same journey as the saw-buzzing drone riffs of "Youngsblood," Russian Circles create effortless atmospheres for fans of both Mono and Pelican to appreciate.