Hostile Witness is the mesmerising new psychological thriller by Nell Peters.

When her husband leaves her and their sons to shack up with a younger model, Callie Ashton thinks she's hit rock bottom. She's wrong. Already unemployed and struggling to hold everything together, Callie's life goes into freefall when she stumbles across the murder of a neighbour. The killer soon becomes intent on despatching Callie too, wrongly assuming she can identify him.

Despite her new man being the officer in charge of the investigation, Callie's in great danger – and it soon becomes clear the murderer isn't too worried whom he kills or maims in his quest to eliminate her. No one is safe and the killer seems to know her every movement. Soon, with no resolution in sight, Callie feels she has no choice but to take matters into her own hands...but at what cost to her safety – and sanity?