This episode of Mentioned in Dispatches features historian and author Steve R. Dunn, who discusses his latest book, Spectre of Invasion: The Royal Navy and the Defence of Britain’s Coast, 1900–1918. The book examines Britain's persistent fears of invasion in the early 20th century, the strategic debates between naval and military defence advocates, and the reality of coastal raids and naval engagements during the First World War. Dunn provides insights into how these concerns influenced British military planning and naval policy during the period.