Strike From The Sea by Douglas Reeman

INDO-CHINA 1941Cruising somewhere off Saigon is the world's largest and most dangerous submarine - the French Soufri?re. A rich prize for the enemy, the British navy must capture her for themselves before she is used against them.For Commander Robert Ainslie, it represents the greatest challenge of his career. He must take the foreign submarine and use her against the enemy in the defence of Singapore . . .
Binding: Paperback / softback