This return to sparer songwriting makes a stark contrast to the rich synthpop of Norwegian Sundfør’s last album, Ten Love Songs. This adventurous artist is far from the winsome charms of her folky 2007 debut, though; now, among the soft fingerpicking of Mantra, or the petal-fall piano and heavenly chorale of Undercover, there’s moody sax, meditative spoken samples and – as in The Sound of War or Mountaineers, a gothically glittering duet with John Grant – throbbing, unnerving electronic textures. As the album’s title suggests, Sundfør wishes to pour oil on the choppy waters of a weary world, and the warm clarity of her voice offers beautiful moments of respite.