Not bad. Some original to me ideas.

The Sleepwalker is a 2017 psychological thriller novel by Chris Bohjalian.

The story explores the mysterious world of parasomnia, blending a missing-person investigation with deep family secrets.

Annalee Ahlberg is a wife and mother who suffers from severe, sometimes dangerous sleepwalking episodes. One night, while her husband is away on a business trip, Annalee disappears from her bed

When a torn piece of her nightshirt is discovered hanging from a tree branch near a dangerous local river, the police and her family fear she may have drowned during an episode.

Her eldest daughter, Lianna, leaves college to care for her broken family.

As the investigation continues, Lianna becomes romantically drawn to Gavin Rikert, the lead detective on the case. However, she quickly begins to realize that Gavin knows far more about her mother’s private life than a detective should, sparking a web of suspicion, lies, and buried desires.

Paige is Lianna’s 12-year-old younger sister. She is described as a highly athletic and gifted ski racer who struggles deeply with her mother’s sudden disappearance, even taking to swimming the local river to search for clues herself.