The true story of loss of His Majesty's Submarine Thetis is still shrouded in mystery, even now, some seventy-five years after her sinking. On 1st June 1939, HMS Thetis sank in Liverpool Bay on her maiden dive, with the loss of ninety-nine lives; the worst peacetime submarine tragedy ever to be suffered by the Royal Navy. As soon as the impending disaster was reported, a massive rescue operation was mounted by the Royal Navy, but, following a catalogue of mis-understandings, political posturing, 'red tape' and sheer incompetence, the operation ended in abysmal failure, with only four of the crew being rescued. There were many on-going recriminations and a number of legal battles, following the Royal Navy's private inquiry, and the subsequent public inquiry. Even after such forensic examination, nobody was held to be culpable for the disaster. As a result of media coverage at the time, a number of conspiracy theories were spawned, some gaining more credence than others, in light of the inconclusive findings of the official reports.In Thetis: Submarine Disaster, David Paul, having studied the events surrounding the tragedy of HMS Thetis for many years, examines the issues which led to the disaster, and draws some conclusions.

David Paul was born in Liverpool at the end of the Second World War. Being born into a sea-faring family, it was no surprise when he too followed the family's naval tradition and began an apprenticeship as a marine engineer with the Pacific Steam Navigation Company, sailing out of Liverpool. Later, as his career developed, he lectured at a marine college in Liverpool where, many years earlier, he had received his formal education in marine engineering. Since learning of the Thetis disaster from his mother, David has continued to research the un-answered questions relating to the doomed submarine.