====== Preface ======
This book is intended to provide readers with a comprehensive knowledge of IoT systems design on a conceptual level. It covers IoT design methodologies, IoT system architectures, IoT data-related aspects, cybersecurity in IoT systems, blockchain in IoT and green IoT.  
Almost every top-level chapter of the book constitutes a separate study module related to a selected aspect of the IoT system design so that this book can be treated as a set of separate guides as well as a solid and complete workbook for an entire IoT course for the master's level.\\

The primary target group of readers are master's students and industrial system designers such as CTOs. This book constitutes a comprehensive manual for IoT technology; however, it is not a complete encyclopedia nor exhausts the market. The reason for it is pretty simple – IoT is so rapidly changing technology that new devices, ideas and implementations appear daily. Once familiar with this book's contents, the reader will understand the IoT systems design methodologies, tools and challenges. This book, however, comprises topics that are pf particular industrial interest - including but not limited to data analytics, cybersecurity and introduction to blockchains, which illustrated the diversity of the IoT world and technology landscape.\\

Even if most of the content is somehow technology-aware, the authors assume that persons studying the contents must have at least general knowledge of the technical details of IoT and embedded systems, including main components on the electronics level, networking, data processing and security.\\ For this reason, students starting their journey with IoT systems should instead start with the "Blue Book" first, which covers all technical aspects of IoT needed as background knowledge for this high-level approach towards IoT systems design.

**Playing with real or virtual hardware and software is always fun, so keep going!**