Black Tide

● "In the last months of World War Two, the German Navy premiered a new and terrifying weapon. A submarine of incredible range that could strike anywhere, anytime. And it did, prowling the shipping lanes night and day, and striking fear into the Allies. Until it disappeared without a trace. Now, more than seven decades later, the wreck of a previously unknown U-Boat has been found off the South American coast. Eager to learn its secrets, a team of marine archaeologists arrive at a unique seafloor habitat to study the wreck up close. But something has survived on the empty sub." ― quoted from this book's Amazon product page as of 2021-11-11.