This chapter has two different parts. The editors, firstly, provide some of the reasons motivating this book project, which has been conceived and planned to give an account of the widespread interest gained by the ordinary concept of “atmosphere” in the last twenty years. “Atmosphere” has been more and more subsumed by the human and social sciences, thereby becoming a technical notion. In this broader context, the editors, secondly, aim at showing and inquiring into the tight relationship between atmosphere and aesthetics. This discipline is no longer only a theory of art, but it has recovered its original vocation: to be a general theory of perception conceived of as an ordinary experience of pre-logical character. In the second part, the editors give a short account of the chapters that comprise the book, which also includes the wide breadth and scope of applications concerning an atmosphere-based aesthetics.