AustLit

'World War III is looming...
Harry has been trying to "get away from it all" for a long time, so he goes sailing to nearby islands with his friend Toby Bowen. They pass a University expedition searching for the wreck of HMAS "Darwin" which vanished in World War II. They meet a mutual friend, Monty, and a pair of beautiful women board Monty's launch, and head for the Hesperides, a group of outlying rocky islands, barren and very seldom visited.
But a curious incident occurs that catapults them out of their idyllic setting and slaps them bang into the middle of a potential real world catastrophe.
On the way to the Hesperides they pass an old minesweeper, the Waroona, due to be "hulked." Diving the reefs, Harry finds a naval gun in shallow water but does not tell the others because he is not sure what it signifies.
Soon it becomes clear that they have stumbled upon a plot by terrorist-supporting groups that will forever damage relations between Britain, America and Australia, unless Harry and his friends can prevent it. But can the momentum of WW3 be averted?' (Publisher's blurb)