The Woman in Cabin 10

The Woman in Cabin 10 is by Ruth Ware. A realistic fiction mystery set on a yacht in the North Sea. Laura Blacklock writes for a travel publication; when a colleague goes on maternity leave, Laura is chosen to go on a promotional cruise on a luxury yacht in the North Sea. She is assigned Cabin 9; looking for mascara, she meets a strange woman in the cabin next door. Later that evening, she wakes to hear a loud splash, rushes to the veranda and sees a bloody smear on the glass partition between her cabin and the next. She calls security and is told that there was never anyone in Cabin 10, and that she imagined the whole episode. Her search for the truth may cost her her life. 

Ratings: 11th grade - 6 out of 10 - P (profanity) - AC (mature thematic content).