Quite when one might listen to Bjork's eighth album is hard to figure - apart from when you get the chance to lock yourself away in seclusion so you can appreciate Biophilia's mighty feat of sonic beauty and its many elaborate layers. Perhaps while you are floating in space would be best.
Or maybe when you are off in your own little wonder world.
So, it seems, it's mission accomplished then for the lovable music maverick from Iceland. On the follow-up to Volta from 2007 she has once again managed to conjure up something demanding, and often confounding, with songs sometimes wafting aimlessly along, yet the overall impact is utterly stunning and intoxicating.
Also, not content to just push musical boundaries, Biophilia, is a multimedia musical experience. In case you haven't heard, it is released as 10 apps - one for each of the 10 tracks - allowing fans to delve inside the songs and interact with them.
Well, that's the idea anyway. But don't panic, because if you are up for the challenge of the album, it is also available in conventional formats. Phew.