In “A Divided Loyalty,” the twenty-second installment of the Inspector Ian Rutledge Mysteries, Charles Todd delivers yet another compelling entry that skilfully blends psychological depth with a fascinating historical setting. Set against the haunting backdrop of Avebury’s prehistoric stone circle, this novel not only enriches its narrative with a keen sense of place but also plumbs the complex interplay of justice and duty that hallmarks Rutledge’s character.

The story commences as Inspector Ian Rutledge, a seasoned yet psychologically scarred veteran of the First World War, is tasked with revisiting an unresolved murder case originally handled by Chief Inspector Brian Leslie. The initial investigation into the murder of an unidentified woman at the foot of a megalith leaves many questions unanswered and no suspects at hand. With a cold trail and few clues, Rutledge faces significant challenges that test his detective acumen and his ethical boundaries.

Todd’s narrative is meticulously crafted, weaving intricate plot lines that explore not only the murder itself but also the internal battle Rutledge faces. Pressured by Chief Superintendent Markham’s less-than-favorable expectations, Rutledge treads a perilous line between duty to his superiors and a moral obligation to a victim robbed of her identity and justice. This internal conflict is one of the book’s central themes, resonating deeply through Todd’s portrayal of Rutledge as a man haunted by war and bound by honor.

The investigation unfolds with a slow burn, mirroring the painstaking reality of police work. Todd excels in creating a palpable tension that builds as Rutledge expands his search and unearths subtle clues leading to what might seem an impossible solution. The resolution is paced beautifully, rewarding readers’ patience with satisfying, albeit challenging, conclusions about the demands of loyalty and truth.

Supporting characters, particularly Chief Inspector Leslie and Chief Superintendent Markham, are well developed, serving not only to propel the plot but also to offer contrasting perspectives on Rutledge’s methods and motivations. The dynamic between these characters enriches the narrative, creating a layered exploration of hierarchy and rivalry within Scotland Yard.

Historically, Todd’s attention to the post-war era is evocative, capturing the social and cultural strains of Britain in the 1920s. The choice of Avebury as a setting, with its eerie and mystical air, adds an almost gothic element to the storyline, heightening the sense of mystery that surrounds the murder.

In conclusion, “A Divided Loyalty” stands out as a strong addition to the Inspector Ian Rutledge series. Charles Todd continues to impress with his ability to blend historical authenticity with complex mystery plotting. This novel is recommended for readers who appreciate a thoughtful, well-constructed narrative that does more than just entertain but also ponders deeper questions about human nature and justice.