The Sleepwalker by Chris Bohjalian

In a small Vermont town, a family is thrown into turmoil when the mother, known for her sleepwalking episodes, mysteriously disappears one night. As her husband and two daughters grapple with the uncertainty of her fate, they uncover hidden secrets and confront their own fears and vulnerabilities. The narrative weaves through the complexities of familial bonds, the haunting nature of sleep disorders, and the relentless pursuit of truth, culminating in a gripping exploration of love, loss, and the shadows that linger in the night.