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This book aims to be an introduction to big data, artificial intelligence and data science for anyone who wants to learn more about those domains. It is neither a fully technical book nor a strategic manual, but rather a collection of essays and lessons learned doing this job for a while. In that sense, this book is not an organic text that should be read from the first page onwards, but rather a collection of articles that can be read at will (or at need). The structure of the chapter is very similar, so I hope the reader won’t find difficulties in establishing comparisons or understanding the differences between specific problems AI is being used for. I personally recommend reading the first three-four chapters in a row to have a general overview of the technologies and then jump around depending on what topic interests you the most. The book also replicates some of the contents already introduced in previous research as well as shows new material created working as a data scientist, as a startup advisor as an investor. It is therefore to some extent both a new book and a 2.0 version of some previous work of mine, but for sure the content is reorganized in a completely new way and gets new meaning when read in a different context. Artificial intelligence is certainly a hot topic nowadays, and this book wants to be both a guide on the past and a tool to look into the future. I always tried to maintain a balance between explaining concepts, tools and ways in which AI has been used, and potential applications or trends for future. I hope the reader may find himself not only grasping how relevant AI, big data and data science are for our progress as a society, but also wondering what’s next. The book is structured in such a way that the first few chapters explain the most relevant definitions and business contexts where AI and big data can have an impact. The rest of the book looks instead at specific sectorial applications, issues or more generally subjects that AI is meaningfully changing. Finally, I am writing this book hoping that it will be valuable for some readers in how they think and use technologies to improve our lives and that it could stimulate conversations or projects that could produce a positive impact in our society.