'Woman in Cabin 10' by Ruth Ware
A travel journalist boards a luxury cruise expecting the assignment of her dreams, only to witness something impossible—a woman vanishing into the North Sea. When no one believes her account and every passenger is accounted for, Lo must unravel the mystery herself. This thrilling whodunit combines the elegance of high-seas travel with mounting paranoia and danger. Perfect for readers who love twisty mysteries and unreliable narrators, this page-turner keeps you guessing until the final reveal. A gripping escape that proves not everything aboard ship is as it seems.