Kip Wagner and L B Taylor, Jr, Pieces of Eight: Recovering the Riches of a Lost Spanish Treasure Fleet, London: Longmans, 1967, pp221 (text) and pp22 (diagrams & photos).
This is a great hardback that comes with a nice and neat dust-jacket that I'd bought from Romie in 1992. It took me about three days to read it and some two years later, I was able to find a new Kapco mylar dust-jacket wrapper from another bookshop downtown to wrap and protect the dust-jacket.
In this book, Kip Wagner narrated to L B Taylor, Jr "this true story of a treasure hunt that has yielded millions [of dollars]. Over 250 years ago a Spanish treasure armada was wrecked on the Florida reefs, and ten richly laden vessels were sunk." This is a story whereby every armchair adventurer (like me) will find fascinating and exciting.