The sleepy red-roofed Italian island of Anapoli, its lazy, leaning buildings pushed against the jagged harbour, dreams on peaceably by the sea. It is here that Tom Patch, an easy-going British artist, finds himself, discarding his mistress and in love with Cecilia. Even the Mayor of Anapoli basks in the sun, listening to goat bells and the rasp of mandolins. But above the unsuspecting residents hangs a malevolent volcano; a terrible destructive power seething below its crust. And the volcano is about to blow.
From Wikipedia: John Harris was a British author. He published a series of crime novels featuring the character Inspector Pel, and war books. He wrote with his own name, and also with the pseudonym of Mark Hebden. His 1953 novel The Sea Shall Not Have Them was the basis for a feature film of the same name in 1954. He was the father of Juliet Harris, who published more Inspector Pel books under the name of Juliet Hebden.