First edition. 8vo.pp.200 + black & white photographs including appendix. Black cloth hardcover previous owners signature in original poor pictorial dust wrapper chipped at corners of spine with some discoloration from tape wrapped now protected else a very good copy. Do you remember the huge minefields around our coast by which the enemy hope to starve us into subjection? The magnetic mines, the acoustic, oyster, and land mines, the devilish booby trap mines, and the rest? Most of the inhabitants of our larger cities and seaports will be familiar with some of them. Hitler banked heavily on these top secret weapons. His experts assured him confidently that there was no answer to them. But, thanks to the small band of incredibly brave men off H dot m.s.vernoncomma the navy's mine and torpedo shore base at Portsmouth, the answer was always found, and found quickly. All the courage, tension, urgency, and deadly peril of the work of the main experts of the "Service Most Silent" in or packe