This is a book which will have a rather specialized sale, more because it would be difficult to convince the average reader that he has any special interest in this form of modern warfare, than because of the nature of the material itself. As a matter of fact, the text is chock full of anecdotal and human interest material, essentially dramatic, and really interesting reading. Historical and biographical data as a background for a careful study of types of mines, their uses, the changing viewpoint as to their importance, the measures of safety sought, and the counter-offensive. The emphasis is on the sea use of mines, -- mine layers, whether by boat, submarine or air, mine sweeping, mine dismantling. Brief notice is given to land mines and to traps set to catch the unwary and acquisitive. Suggestion is made of what this war and the future hold in the way of invention. English, primarily, though the foreword by Com. T.B. Thompson of the USN gives it special significance here.