Callie Munro Thriller Books in Order

The Callie Munro Thriller series moves Tariq Ashkanani's crime writing to present-day Edinburgh. Its central character, Callie Munro, is a private investigator who works outside the police system and has to make progress without official authority, easy access to evidence, or much patience for being told to stay out of danger.

The series begins with The Night Watcher. Callie's routine work brings her into contact with Grant Miller, a difficult client whose wife, Amy, soon disappears. When Callie arrives at the Millers' home and finds the police already there, the scene suggests something more troubling than a domestic dispute. A strange hole in Amy's bedroom wall points to an intruder, but the people around Callie are quick to settle on simpler explanations.

Callie isn't convinced.

As she keeps digging, she finds signs that other women in Edinburgh may have vanished in disturbingly similar circumstances. The investigation becomes a search for a serial predator, but it is also a test of whether Callie can get anyone to listen before another person disappears. The police are reluctant to follow her leads, leaving her to build the case herself and decide which risks are worth taking.

Edinburgh matters here as more than a backdrop. The city has polished public spaces, older streets, private wealth, and a criminal undercurrent that Callie has to navigate carefully. Her investigation draws her toward people with influence on both sides of the law, including an underworld figure who has his own reasons for wanting answers. That gives the story a tense, street-level feel, with alliances that may be useful but never fully safe.

The tone is dark, brisk, and built for readers who enjoy a determined investigator working against institutional indifference. Callie is tough, but she is not a superhero, and the cases place real pressure on her judgment as well as her safety. The series is interested in missing people who are too easily overlooked, and in the cost of refusing to look away.

Start with The Night Watcher to meet Callie at the beginning of her investigation career. It establishes her working methods, her Edinburgh world, and the kind of cases that will follow her.