When euro was first introduced, many believed that it will significantly challenge the US dollar for the position of planet's top currency. Today - as some 800 billion are circulating in the global financial flow the euro is being used by more than 300 million people a rather impressive accomplishment in just a few years time. Nevertheless, as financial crisis has hit Europe, euro-zone is facing serious difficulties. Doubts are being raised whether creating a single currency was the right thing to do for a union whose members are so economically different. In order to find out more about euro, its usage and status read this book.