The challenge facing anyone who writes about Google (GOOG) is that readers may assume they already know all that can be said about the Internet search giant. After all, the 10-year-old juggernaut has been the subject of many thousands of press reports and at least two mainstream books. But to his credit, in Planet Google: One Company's Audacious Plan to Organize Everything We Know, author Randall Stross digs beneath the usual Googley tales of lava lamps and free gourmet food for employees to offer new insight into the company's pointedly unorthodox business practices. At a slim 200 pages, not counting notes and index, Planet Google isn't comprehensive. Yet Stross, a New York Times columnist and San Jose State University business professor, dives in far enough to illuminate the method and singleminded madness behind Google's mission to "organize the world's information."