Good stuff HarryT8, I'm always on the lookout for more sub books.
Thanks for the recommendation.
And here's one of my own.
Unbroken by Alastair Mars
A Brit U Class Sub operating from Malta in '42.
From the blurb
'In twelve months in the Med, Unbroken sank over 30,000 tons of enemy shipping, took part in four secret operations, three successful gun actions, and survived a total of over 400 depth charges, as well as innumerable air and surface attacks.'
http://www.amazon.co.uk/Unbroken-Sto...ref=pd_sim_b_1
A bit short. But a very enjoyable read.