James Gleick (http://en.wikipedia.org/wiki/James_Gleick and http://around.com/) is a Pulitzer Prize winning journalist, writer and lecturer. He made his name in 1987 with Chaos.
Chaos theory has made huge advances since that time but this is possibly still the best introduction on the subject for the layperson. It describes the Mandelbrot set, Julia sets, and Lorenz attractors without resorting to complex mathematics. Is the Universe governed by a fundamental set of iron clad laws which it is our task to discover? Or, at bottom, is there an irrepressible spontaneity that can never be captured in a formula, never fully known? Did Gerard Manley Hopkins (http://en.wikipedia.org/wiki/Gerard_Manley_Hopkins) have it right?
There lives the dearest freshness deep down things;
ISBN 978-0749386061