This book is a reprint of "Etna Valley Dossier," which was originally published in 2001, and gives an overview of how Sicily's Silicon Valley began and grew during its best years. The Etna Valley Dossier was intended as a resource for journalists, providing an in-depth understanding of the factors that contributed to the success of the "digital revolution" in this Italian region.The dossier was written for the press and people working in the ICT industry to give a clear and detailed starting point for dealing with one of the most important and representative industrial trends in southern Italy over the last decade of the 20th century. The author of this study did a remarkable job in capturing the spirit of the times and the energy of the companies that made this region a center of technological innovation. A work that has been online in Italian for years, providing the basis for hundreds of articles, analyses and insights, is now finally available to a wider audience with this English translation. This book serves as a reminder of the potential of economic development at a regional level and the impact that a supportive ecosystem can have on innovation and economic growth, as well as a valuable resource for policymakers and researchers seeking to understand the dynamics of technology clusters and the role of governments in fostering local innovation.