While on a mission aboard the The Emperor of the Seas, Ben Ripley faces off against his arch enemy, Murray Hill, on the high seas and quickly finds himself in hot water as things take a dangerous turn.

Embarking on a Grand Cayman cruise with their extended family to celebrate Grammy Verra's birthday, stepsisters Stephanie and Diana discover a plot to smuggle a rare, endangered blue iguana.

Looking forward to a working vacation as nurse on a cruise ship to the Caribbean, Cherry Ames soon finds herself embroiled in a dangerous mystery involving a sickly child and greedy men anxious to find a secret stockpile of precious ambergris.

Despite her fears of being a "third wheel," Mallory goes on a cruise for the wedding of the mother and father of her two best friends.

Detective duo John Boarhog and Inspector Toadius McGee embark on a luxury airship to intercept an old adversary, but when the Society of Sleuths decides it is time for John's trial to gain full membership, there are no clear skies ahead. Fresh off recovering a billion-dollar ruby and losing the criminal who stole it, John Boarhog and Inspector Toadius McGee are soaring high on a new adventure. Hoping to intercept the Mauve Moth before they execute...

"Teen sleuth Sammy Keyes solves a classic locked-room mystery aboard a cruise ship"--Provided by publisher.