One city always seems to win the award for most-wanted style--Paris, where people walking down the avenues mix timeless and trendy pieces in a way that appears effortless. French fashion writers Isabelle Thomas and Fr d rique Veysset break down the "je ne sais quoi" of Paris street style, describing the essential elements that should be in everyone's wardrobe. Renowned experts on French style--designers, stylists, editors, and celebrities--also chime...