Shadow Divers by Robert Kurson
This non-fiction book chronicles the dangerous and suspenseful adventure of two deep-sea wreck divers who, in 1991, discovered a sunken German U-boat off the coast of New Jersey. Despite the risks and the skepticism of experts, the divers became obsessed with identifying the seemingly untraceable submarine. Their quest for answers led them to delve into historical records and put their lives on the line during numerous dives, ultimately revealing the U-boat's identity and bringing closure to a long-lost chapter of World War II history. The story is a testament to the power of curiosity, perseverance, and the human spirit's drive to solve the mysteries of the past.