DI Fiona Williams Mystery Books in Order

Detective Fiona Williams investigates a murdered man discovered in a burning van and a second body nearby. When a witness is killed, links to a missing teenager draw her toward powerful men and a wider conspiracy.

A single mother’s murder leaves DI Fiona Williams questioning whether her own relationship history clouds her instincts. With colleagues reading the evidence differently and three children’s futures at stake, she must decide whether to trust her interpretation of the crime.

Three apparently unrelated murders strain an understaffed police station and divide its investigators. DI Fiona Williams suspects a connection between a poisoned pensioner and a landowner’s murdered wife, but proving it may require risking her life for an old enemy.

A pupil’s drowning at a private boarding school leads DI Fiona Williams to suspect a secret society’s initiation went wrong. When another student dies, staff, influential parents and pupils maintain a wall of silence that protects more than the school’s reputation.

A woman’s fatal fall down cellar stairs proves suspicious, drawing DI Fiona Williams into disputes over hunting and a questionable police appointment. A second murder and a missing officer complicate the investigation while a family crisis threatens Fiona’s concentration.

Five students are shot dead, but one young woman survives unharmed. DI Fiona Williams focuses on the survivor’s unsettling indifference while conflicting evidence, further deaths and public pressure force her team to question the assumptions guiding their investigation.

DI Fiona Williams investigates a burglar who steals personal trinkets rather than valuables, then reviews a suspected suicide. Another unexplained death and a secret shared by former teenagers connect the cases, forcing her to choose between an arrest and protecting a colleague.