The quest began in 430 B.C. when a Greek philosopher smelled bread baking and imagined that an invisible particle might be the building block of all matter. He called it the a-tom - "that which cannot be cut" - and its pursuit has become science's longest-running experiment. Now, in a book of dazzling originality, Nobel laureate Leon Lederman tells the story of the 2,500-year search for the answer to an ancient question: what is the world made of?...