First Edition, First Impression. 13.7 x 20.4 cm blue cloth with white titles to the spine 416pp with double page map frontispiece. In original unclipped dust jacket priced at 12/6 net. Clean boards with firm, sharp corners and a touch of fading to the titles. Internally there is a previous ownership name to the front pastedown and a little spotting mainly to the very edge of the text block and the first few and last few pages. There is also a band of slight toning on the free endpapers where the jacket does not reach. The dust jacket presents well in its removable, clear cover (not shown) and is clean and bright with just a hint of rubbing to the spine tips and corners and 0.8 cm closed tear to the bottom edge of the rear panel with a little associated creasing and a 4cm closed tear extending up from the foot of the spine that has been stabilised with tape on the verso of the jacket. The front flap has some rubbing which means there is loss of surface paper which affects the bottom two lines of text. All in all a very good First Edition copy of this World War II naval story that was later turned in to a very successful film.