A comprehensive overview of the subject, demonstrating that the maritime aspects of the civil wars were much more important than has hitherto been acknowledged. NOMINATED FOR THE MILITARY HISTORY MONTHLY BOOK OF THE YEAR AWARD! The civil wars in England, Scotland and Ireland in the period 1638-1653 are usually viewed from the perspective of land warfare. This book, on the other hand, presents a comprehensive overview of the wars from a maritime perspective. It considers the structure, organisation and manning of the parliamentarian, royalist, and Irish confederate navies, discussing how these changed overthe course of the wars. It also traces the development of the wars at sea, showing that the initial opting for parliament by seamen and officers in 1642 was a crucial development, as was the mutiny and defection of part of the parliamentarian navy in 1648. Moving beyond this it examines the nature of maritime warfare, including coastal sieges, the securing of major ports for parliament, the attempts by royalists to ship arms and other supplies from continental Europe, commerce raiding, and the transportation of armies and their supporters in the invasions of Scotland and Ireland. Overall the book demonstrates that the war at sea was an integral and important part of these dramatic conflicts. RICHARD J. BLAKEMORE is a Lecturer in the History of the Atlantic World at the University of Reading. ELAINE MURPHY is a Lecturer in Maritime/Naval History at the University of Plymouth and author of Ireland and the War at Sea, 1641-1653 (Boydell Press, 2012).