Selecta : [selected works of Benoit B. Mandelbrot reprinted translated or new with annotations and guest contributions] ; Vol. C: Fractals and chaos : the Mandelbrot set and beyond Informal Introduction * Quadratic Julia and Mandelbrot Sets *Non Quadratic Rational Dynamics * Iterated Nonlinear Function Systems and the Fractal Limit Sets of Kleinian Groups * Multifractal Invariant Measures * Quaternionic Quadratic Dynamics * History * Bibliography *