Max Richter’s acclaimed 8-hour music composition known as “Sleep” — which brought overnight performances to Sydney, Berlin, Paris and beyond in 2015 — is turning 10. To celebrate, not only has the composer released a shortened version of the album (it’s 90 minutes long, the length of one REM cycle), but he is touring once again with the live all-night affair, which plays to audiences snuggled up in bed, wearing comfy clothes, for dozing. The World’s Host Carolyn Beeler has more.