Here's another undersea addict's delight: the story of H. M. Submarine Seal which was crippled by a mine in May, 1940, between Sweden and Denmark, and captured with all its crew by the Germans. Seal was struck while submerged; it was only by the merest chance or greatest miracle that she reached the surface again. Her captain later became a minister, and no one who reads what he went through will have to wonder why. This much of the story is the first half of the book; the second half is quite anticlimactic, dragging on from POW camps through a postwar court martial, the outcome of which is a foregone conclusion. Both authors saw service in ""boats"" themselves, and what they have produced is so technically detailed as to be almost purely (and monotonously) a submariner's submarine book. The English characters are all very British, with enormously stiff upper lips. The few Germans who appear, however, are quite human, with not a single villain in the lot. But in view of the great armada of similar books already launched, it should not be too unfair to say that this one is what Seal herself was in World War II---quite expendable, after all.