This book is derived from modules forming a full course in electricity and magnetism (E&M) as given by the authors. The book starts with the definition of the electrization state, describing both the electrization state of charged and polarized bodies, respectively, and goes on to discuss how the electric field develops in conductors to electrostatic equilibrium, as well as in insulating materials, especially in dielectrics. This book is suitable for students taking a general E&M course or those undertaking a more specialized course in electrostatics. The advanced math support required to follow the scientific content of the book is provided through appendices, and theoretical concepts are consistently blended with examples of real-life applications. It contains numerous worked examples and exercises that will help students to secure an excellent assimilation of the knowledge, as well as a deep understanding of the physical phenomena under discussion and representing the most important methods to solve electrostatic problems.