This concise yet comprehensive primer on ionising radiation protection includes chapters on foundational nuclear physics, radiation units, the biological effects of radiation exposure, radiation risk and epidemiological studies, internal and external radiation hazards, background radiation, radioactive waste management, and radiation detection. The background knowledge to understand each topic is included early in the book. Each topic is introduced slowly and the complexity and depth are increased to a level commensurate with a masters degree. End-of-chapter exercises enable the reader to consolidate their knowledge.  This text is ideal for anyone wanting to gain insight into the most important areas of the field and will well-equip those wishing to explore the subject in further depth/detail/breadth.