Small paperback. Published in 1976. Pages have slightly yellowed. It does not look like it was read, but there are a few very minor signs of a long shelf life.
“A stunner… the twist in the very last page will leave you gasping” – Daily Mirror
“A blood-and-cyclone story… action follows action, menace mingles with violence and horror and Harry Fletcher with blonde and brunette… Mystery piled on mystery, climax on climax and death on brutal death as Fletcher hunts the Mozambique Channel for the ocean’s unknown treasure. A tale to delight the millions of addicts of gutsy adventure story” – Sunday Express