How Little Things Can Make a Big Difference
Gladwell writes about the unusualness of the usual things. The book is focused on epedemic sciece and the narration is quiet non-technical. You don't have to be a scientist to learn about this science. Good case studies - Airwalk, Hush Puppies, etc are described throughout the book.
It is a must read for marketing professionals, epidemic scientists, publicists, revolutionaries or whoever wants to spark off news about just anything.