This chapter summarizes the content of the book by highlighting the main contributions of each chapter. In Part I we discussed mainly topics related to technical cyber security training, followed by a presentation of other forms of training. In Part II we reviewed a set of actual CTF and cyber range platforms, followed by a detailed case study on the CyTrONE training framework. Key takeaways are provided next in order to emphasize the most significant insights of the book. At the end of the chapter, we discuss a set of trends and future prospects with regard to cybersecurity education and training.