The album was recorded and mixed at Dierks Studios, Stommeln, Germany in October 1972, produced by Peter Hauke & Nektar and engineered by Dieter Dierks. Among the admirers of this album was Steve Harris of Iron Maiden and his band would cover ‘King of Twilight’ on the B-side of their ‘Aces High’ single in 1984. This new box set edition features 4CDs and a region free Blu-Ray disc and has been newly remastered from the original master tapes. It includes a new stereo & 5.1 Surround Sound mix of the album and also features a marvellous, previously unreleased complete concert recorded in Erbach, Germany in April 1973 and a newly remastered version of the 1976 US album version.