As attention of scholars shift from perils of presidentialism to perils of semipresidentialism in the recent decades, French style of cohabitation power sharing mode in the executive merits our endeavor to understand the micro-dynamics that is embedded in it. It includes how it emerged, how it was practiced and what consequences it produced. Such effort, if wisely applied, can probably be helpful in slowing down the rate of political system breakdown in many of the newly emerged democratic systems that emulate the French model. After an introduction to the blackbox of French cohabitation, the remainder of the book is divided into eight chapters.