Happiness and Unhappiness: Two inseparable sisters who tacitly are fighting and tend their nets to all people in order to be adopted as theirs lifestyle. Both of them live alternately within each person and their time spent in the host will be decided by him. Through these pages, the reader will learn the keys points of how he can achieve it "Happiness" be the guest who will to visit him more often and stays longer with him, in order to enjoy a more pleasant and enjoyable life .. . It is a book with a frank and sincere invitation to Better Living