The protagonist, , is a forensic psychologist and professor whose nickname stems from the four causes of death she analyzes: N atural, A ccidental, S uicide, or H omicide. While documenting a witchcraft legend in the Legarrea chasm in Navarra, she discovers the body of Andrea Dancur, a young girl who disappeared three years earlier.

Published in late 2024, is the latest masterpiece from Dolores Redondo, the acclaimed author of the Baztán Trilogy . This novel marks the beginning of a new series titled Los Valles Tranquilos (The Tranquil Valleys) and continues the "mystic noir" genre that Redondo pioneered. Plot Overview: Science vs. Ancestral Mystery

The story is set in March 2020, right at the onset of the COVID-19 pandemic, which adds a unique layer of tension and isolation to the investigation.

Typical of Redondo’s work, the book blends rigorous scientific methods with ancient Basque mysteries and folklore. However, this novel is noted for a more realistic treatment of these mystical elements compared to her previous works. Availability and Formats

This discovery is shocking because a woman is already serving time for Andrea's presumed murder. The find forces the reopening of the case, leading Nash to investigate whether the death was an accident, a suicide, or a murder—potentially exonerating an innocent person while uncovering a far more sinister truth.

The title "Las que no duermen" (Those Who Don't Sleep) is a tribute to female resilience throughout history. It references medieval beliefs where women awake at night were considered vulnerable to evil, turning that superstition into a symbol of strength and sorority.

The book is widely available across major platforms and retailers: the highly awaited new novel by Dolores Redondo

Nash’s approach is deeply empathetic. She acts as the "psychologist of a dead woman," analyzing the victim’s life and belongings to understand their perspective and give them a voice.