I Did Warn Her A Novel

I Did Warn Her, a novel by Sian Gilbert, is set to be published by HarperCollins Publishers on June 17, 2025. This 384-page book is written in English and presents a locked room mystery aboard a luxurious yacht, the Ophelia, owned by a ruthless billionaire. The story follows a crew of stunning stewardesses, including last-minute hire Sasha, as they navigate a weeklong Atlantic crossing filled with secrets, rivalries, and a series of unsettling events, including a mysterious death.
Readers will find a narrative that intricately weaves together elements of mystery, thriller, and suspense. As the crew grapples with the aftermath of a death and the disappearance of expensive jewelry, tensions rise among both the crew and the guests. The novel explores themes of deception and rivalry in a high-stakes environment, where everyone becomes a suspect when the lights go out. I Did Warn Her promises to deliver a twisty and voyeuristic experience, revealing the dark secrets of the ultra-wealthy amidst the opulence of the high seas.
Official synopsis Publisher
“I DID WARN HER is Below Deck with a body count, and I loved every minute of it. Intricately plotted and devilishly dramatic, with a claustrophobic setting and a final twist to kill for, I DID WARN HER is everything I want in a thriller. I can’t wait to see what Sian Gilbert does next!” — Sara Ochs, author of The Resort
A luxurious yacht, a gorgeous crew with secrets and rivalries…and murder! I Did Warn Her is a cunning locked room mystery set on a billionaire’s yacht, by the author of last year’s sensation She Started It.
The Ophelia is your typical billionaire yacht: ridiculously luxurious, owned by a ruthless money man, and staffed by a crew whose only job is to indulge the guests’ every wish.
Model-gorgeous Sasha is a last-minute hire for a weeklong Atlantic crossing. She joins fellow stewardesses Jade, Imogen, Euphemia, and Lola. The Ophelia’s stewardesses are almost identical–blonde and model-gorgeous–and all were lured to the Ophelia by high wages and a chance to leave their problems behind when they set sail. But despite its sleek opulence, the Ophelia isn’t as heavenly as it seems. A stewardess on the previous charter died under mysterious circumstances, the guests’ expensive jewelry keeps disappearing, and the crew grows steadily more and more suspicious of one another.
Then the yacht’s owner brings aboard his best friend and two more women, also beautiful. Also hiding something.
When a crew member turns up dead after a night of partying, everyone on the yacht is a suspect. Who is the jewel thief? Who is the murderer? What will happen when the lights go out, and the crew and the guests are finally on equal footing?
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.
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