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Mandrake Memorial's Puzzle album has some mind-bending cover art by optical illusionist M.C. Escher. That in itself is a clue that the music contained within is going to be different to say the least. The band combines psychedelic rock with stately baroque and classical styles to offer up a magical blend of music conducive to the dreamer's mind.
The band was formed in Philadelphia in the late 1960s and recorded three albums. They were a hit locally and attained a cult status on the psychedelic scene, but they never achieved enough popularity to make it big. For the band the dream was over, but we can still enjoy the incredible dream music of Mandrake Memorial since it is still available.
I would recommend any of their albums, but Puzzle is their absolute masterpiece. This is music to dream by.