An entire book dedicated to 20th Century Techniques. Each technique has an explanation, a few practice tips and an example of it's notation. Includes flutter tonguing, harmonics, whitle tones, jet whistle, multiphonics, tongue rams, speaking and playing at the same time, microtonality, circular breathing and much more. Also contains many fingering charts to play in the 4th octave, microtonal scales and multiphonics. The final appendix lists each technique along with a few recordings to listen to for examples. Written in both German and English. Published in 2002. -AP