Lord of the Flies meets And Then There Were None... but with Instagram and too much Prosecco.

Poppy Greer is getting married and four of her old schoolmates are to be her trusted bridesmaids. They may have drifted but true friendships last a lifetime, don't they? Plus, who would pass on a free first-class ticket to white sands and bottomless cocktails on a private Caribbean island?

But the women have underestimated their host, and each other. And as their darkest secrets are revealed, the trip of their dreams becomes the hen do from hell.

Will anyone make it off the island alive?

WHEN THERE'S BLOOD IN THE WATER, A FEEDING FRENZY IS SURE TO FOLLOW . . .

The Ophelia is your typical superyacht: luxurious, owned by a ruthless billionaire and staffed by crew who have just one job: keep the guests happy, whatever it takes. Sasha is the latest hire on a week-long Atlantic crossing, and she fits right in. In fact, she could be mistaken for any of the stewardesses: tall, blonde and model gorgeous.

But despite its sleek opulence, the Ophelia isn’t as heavenly as it seems. And when one of the stewardesses is found dead after a night of partying, all eyes turn to Sasha. But she’s not the only one with something to hide and below deck, nothing stays hidden for long.

Endlessly twisty and delightfully voyeuristic, I Did Warn Her is a whodunnit on the high seas, where the dark secrets of the ultra-wealthy have nowhere to hide.