Internet of Behaviors (IoB) is a concept that the author introduced in 2012. It became globally known in 2019, when Gartner listed it as a major technology trend for 2020s. The book is not an engineering guide, but a conceptual introduction to the IoB, with a human focus. The idea of coding and addressing behaviors like the IoT addresses objects and systems, is new, although it has historical predecessors. IoB suggests ways to generate, code, address and manage the IoB data for the benefit of people, businesses, services, and mankind. Some applications areas are suggested. The amount of behavior data in the net increases fast and there is a pressure to manage these accumulating, sensitive and valuable data masses. At the moment, there is no standard way to code and represent behavior data so that it could be systematically and with a global reach be used for beneficial proposes. The book looks at this challenge and introduces a human approach. Potential contributions of the emerging technologies for the IoB are considered.