Buy the records 

The physical CDs should be available in most good record stores when released in your territory. The 2016 release will also be out on vinyl (ECM 2465 - 2LP set) .

If you prefer on-line buying; or if you experience difficulties finding the physical album; there are several Internet services offering the albums. Try your branch of Amazon - www.amazon.com or  www.amazon.de  or www.amazon.fr.

iTunes Store offers the albums for download, as do also several high resolution audio download services (www.HDTracks.com, www.GubeMusic.com and www.HighResAudio.com).

As for streaming services - Spotify, Tidal, Apple Music etc. - ECM Records has drawn its entire catalogue from these. This is a challenging landscape and a difficult discussion (in which I have engaged elsewhere), but ultimately it's the record label's decision. Anyway, for now, enjoy the benefits of the physical product or the solid download, with cover booklet/pdf and superb sound..