This unique account charts the complete story of a single U-boat patrol through the summer of 1942 based around a remarkable collection of photographs that were ‘liberated’ from a concrete U-boat pen in Brest at the end of the war and which had, until recently, remained hidden in a shoe box. The boat in question, U-564, carried the famous three black cat motif of Reinhard ‘Teddy’ Suhren who, along with Prien and Kretschmer, was one of the top U-boat commanders during the battles of the Atlantic.This remarkable book provides unique access into both the day-to-day life of a U-boat at sea and into the detailed workings of the Kriegsmarine. Through the successes and trials of U-564 the reader is transported to that vast and watery battlefield that was perhaps the most significant theater of the Second World War.