Unbroken: The Story of a Submarine

Detailed account of the life of a British submarine in WW II. The submarine saw action in the Atlantic and the Mediterranean. its captain - and author of the book - was Alistair Mars. His discipline and training methods led his crew to use the then current Mars bar advertisement to describe him i.e. "Only the best is good enough for Mars!" A very good read for anyone interested in the day-to-day battles fought out at sea.