I've got the following books from the library:
Music of the spheres. Music, science, and the natural order of the Universe.
Music theory and natural order from the Renaissance to the early twentieth century.
Cosmic music: musical keys to the interpretation of reality: essays by Marius Schneider, Rudolf Haase, Hans Erhard Lauer.
Harmony of the spheres: a sourcebook of the Pythagorean tradition in music.
Harmonies of heaven and earth: the spiritual dimension of music from antiquity to the avant-garde
I was surprised at how many books there were relating to the music of the spheres, but also have a feeling that they are going to be quite similar in content..