Bo Hansson, a multi-instrumentalist from Goteborg (Sweden), who had already released three albums with the duo Hansson & Karlsson, composed Sagan Om Ringen (1970), reissued as Lord Of The Rings (Buddah, 1972), an original take on psychedelic, gothic, progressive and electronic rock. Hansson played almost all the instruments, including the synthesizer. The resulting sound of the 12 impressionistic vignettes was unique, predating both Brian Eno's electro-pop and new age music, mixing folk, classical, jazz and pop one year before Mike Oldfield.

The jazz element is stronger on Magician's Hat (1972), which is more of a group effort and includes lengthier tracks (Big City).

A more ambitious production (with an impressive cast of keyboards) bestows on Attic Thoughts (1975) a Yes-like grandeur. This would remain a classic of symphonic rock, at least as far as "sound" goes.

Bo Hansson died in april 2010 at the age of 67.