This chapter discusses the motivation for this book, which is to assist the cybersecurity education and training efforts that are required to bridge the existing workforce gap. Then, the two-part book structure is explained, with the first part focusing mainly on technical cybersecurity training, whereas the second part analyzes actual cybersecurity training platforms. This is followed by an outline of the main characteristics of the existing literature related to cybersecurity education and training, which mostly concentrates on teaching practical low-level cybersecurity skills. The key contributions of this book are then described, indicating that it provides enough theoretical background and concrete details to serve as a comprehensive guideline to effectively address all the issues related to planning and conducting cybersecurity education and training activities. Finally, the intended audience of the book is discussed, with the main audience being cybersecurity education and training practitioners and professionals, both in the academia and industry.