Bob Graettinger was arguably the most radical arranger to ever work in jazz. In fact, it is doubtful if any other big-band leader other than Stan Kenton (who always encouraged adventurous writers) would have used his very complex charts during this era. Graettinger's works, which were influenced by aspects of modern classical music (but were not at all derivative) are all included on this fascinating, if difficult, CD reissue. The four-part "City of Glass," the pieces that comprised This Modern World, and a variety of shorter works (including the remarkably dense "Thermopylae") make for some very stimulating listening. This is avant-garde music that still sounds futuristic in the 21st century. ~ Scott Yanow, All Music Guide