Under the Red Sea Sun by Captain Edward Ellsberg. I enjoyed this book about his salvage efforts of the port of Masawa in Ertria Ethopia immensely. It is not only an emminently enjoyable read it is also one of those stories of how one person can make chicken soup from chicken s$%t.
Here is the story of a retired master naval salvage man (one of the best in the world) brought back into service for WW 2, sent with just 6 men and no equipment to a true hellhole on the Horn of Africa he proceeds to rebuild an entire port and naval shipyard from the ruins left by the Italians. His creativitiy and drive are one of those true American ingenuity stories.
Note, this guy also invented the underwater cutting torch prior to WW 2.
Captain Ellsberg was also responsible for later salvaging many of the ports in North Africa and a major player in the success of the Mulberries at Normandy. The later was in another book he wrote called
The Far Shore.
Edward Ellsberg - official web site