I am a student just starting a PhD in the area of personality psychology. This is an outstanding book that significantly moves positive psychology forward. It is becoming critical for students, researchers and practitioners to be aware of this field, and there is no finer textbook avaliable. What makes this book unique is that it is the only one that focuses on how positive psychology can be applied in all areas of life (including health, teaching, and work). This feature also makes it fascinating for the non-professional interested in how psychology relates to their lives, and who wants their reading fully supported by research. Another key strength of this book is that each chapter is written by a world expert, so the end result is a book that includes more state of the art knowledge than would be possible were the entire book written by a single author.