The book "CP Violation in Particle, Nuclear, and Astrophysics" offers a comprehensive introduction to the fascinating developments in the field of CP violation, as evidenced by the groundbreaking experiments of the BABAR and BELLE collaborations. These experiments have reignited interest in the physics of CP violation and open new perspectives for investigating time reversal symmetry. With the advent of novel experimental techniques and high-intensity neutron sources, it will be possible to significantly lower the current limits of the electric dipole moment of neutrons. This is crucial for testing theoretical concepts beyond the Standard Model and explaining the imbalance between matter and antimatter in the universe. The lecture notes, which stem from a summer academy, provide valuable insights and are an important resource for emerging scientists in this dynamic research field.