The authors are both diving experts and in addition to the accounts and historical pictures they have added their own photography to convey to the reader the challenges of the dives undertaken. The technical demands were considerable, from adjusting the camera housing to accommodate the depth to diving at particular times of the year because many of the wrecks were situated in areas of high seas and extreme currents. Many of these wrecks have been the subject of concerted efforts from salvage teams but success could never be assumed.
It took several years to visit and photograph the wrecks mentioned in the book which provides a fascinating account of the vessels and their treasure, and the challenges of diving in what can be a dangerous environment. Each entry provides details and a brief history of the vessel and the means of its demise, enhanced by a modern diving account with photographs