SHIP OF GOLD by James Leasor

‘An all action thriller’ Daily Mail

Only months before, Anthony Carter's hopes of a promising military career had been shattered overnight. Now he is an out-of-work swimming instructor with nothing before him but the prospect of a chilly Portuguese winter.
So Mr Serrafino's offer of employment comes as a lifeline. Carter is to supervise the team of tough German divers who will be raising gold bullion from a sunken treasure ship. But Mr Serrafino may not be quite the respectable businessman he appears to be...
And the ship of gold may prove to be a cargo of lethally dangerous fool's gold...