The first and formost purpose of this book is to show the effect of working capital management on firms' profitability. It shows the impacts of both working capital investment and financing decisions on firms' profitability. So far, various studies show that, working capital management affects firms' profitability but most of these studies were conducted in western developed economies. Thus, this book detailed and shed light on the effect of working capital management policies on firms' profitability in case developing countries.