This collection of selected articles documents the pioneering work of J.C. `Charlie' Martin and his colleagues in modern pulsed power research at the Atomic Weapons Research Establishment, Aldermaston, Reading, United Kingdom. The articles, taken primarily from Martin's notes and his lectures on high voltage topics, brings his knowledge of the field into focus. This collection also contains never-before-published reports from Aldermaston. The material is remarkably current and deals with pulsed systems less sensitive to those factors involved in slower pulsed scenarios. Articles also cover the design and operation of large pulsed power systems.