London: George Allen & Unwin, 1955. First Edition. Hardcover : pp. [i-iv] v-viii, 1-123  : 6 pages of illustrations including frontispiece : Line drawings throughout by author : Aqua blue cloth covered boards with argent lettering on spine : Dust jacket protected by Brodart cover : Dust jacket cover photo 'Going Down' by Norman Lewis, F.R.P.S.
Head and tail of spine slightly pushed : Toning to endpapers : Light fox marks to edges and occasionally throughout : Wear to edges of dust jacket. Good / fair. Item #1668
'With the help of this book, all that has excited the reader in many recent books of underwater adventure can easily come true. Mr Aldridge, well-known for his novels, is an enthusiastic undersea hunter himself.' (dust jacket).