He was the brash, brilliant and sometimes bumptious brat of Silicon Valley, a symbol of its high-tech genius and fabulous sudden wealth. Alternately infuriating and inspiring, Steve Jobs co-founded Apple Computer in a California garage nine years ago and helped build it into a billion-dollar business that gave rise to the personal-computer industry. Along the way, Jobs was widely hailed as the prototype of a new American hero--the irreverent and charismatic young entrepreneur.
Last week an embittered and virtually powerless Jobs resigned as Apple's chairman and from the board of directors, following an anguished break with President John Sculley. But Jobs,...