[torpedochief]

My picks for non-fiction are:

U-boats Under the Swastika

WOLFPACK (Osprey)

Wolf Pack (Naval Institute Press)

The U-boat (Rossler)

Zu Tode Gesiegt (Buchheim)

Die U-Boot Fahrer (Buchheim)

For Fiction:

The Sea Wolves (Steve Wilson)

Das Boot (Buchheim)

Of Ice and Steel (Me)

Hope this helps,

Don