When I was working on the first edition of this book I would never have thought it would become such a success. My biggest thanks go to all the readers of the first edition of this book, to those who bought it, to those who left a review, and to those who recommended it to their friends on Twitter or on other online forums. And of course, my gratitude also goes to the readers of this second edition; to you who are reading these words, you make all our efforts worthwhile. I also want you to join me in congratulating my friend Luciano, the co-author of this second edition, who did a tremendous job updating and adding new invaluable content to this book. All the merit goes to him as I only had the role of adviser in this second edition. Working on a book is not an easy task, but Luciano impressed me and all the staff at Packt for his dedication, professionalism, and technical skills, demonstrating he can achieve any goal he sets his mind to. It was a pleasure and a honor working with Luciano and I'm looking forward to other great collaborations. I also want to thank all the people who worked on the book, the folks of Packt, the technical reviewers (Tane and Joel) and all the friends who provided valuable suggestions and insights:  Anton Whalley (@dhigit9), Alessandro Cinelli (@cirpo), Andrea Giuliano (@bit_shark), and Andrea Mangano (@ManganoAndrea). Thanks to all the friends who give me unconditional love, to my family, and most importantly to my girlfriend Miriam, the partner of all my adventures, who brings love and joy in every day of my life. There are still a hundred thousand adventures awaiting us.