Victorian Setting: The story is set in Victorian Scotland, capturing the historical atmosphere and societal norms of the era, including the challenges and intricacies of the time.

Detective Duo: The narrative centers around the partnership between Inspector Frey, a refined and methodical detective from London, and McGray, a rugged and superstitious Scottish detective with unconventional methods.

Mystery and Suspense: The book revolves around a gripping mystery, often involving complex puzzles, eerie occurrences, and unexpected twists that keep readers engaged.

Supernatural Elements: The Frey & McGray series is known for blending mystery with elements of the supernatural, incorporating ghostly happenings and mystical elements that add a unique flair to the investigations.

Character Development: Throughout the series, the characters, especially Frey and McGray, undergo personal growth and face personal challenges, adding depth to their personas.

Historical Detailing: De Muriel's writing often includes intricate historical details, immersing readers in the Victorian era, including its societal norms, scientific advancements, and cultural nuances.

Atmospheric Writing: The author creates a vivid and atmospheric setting, using descriptive language to transport readers to the streets of Victorian Edinburgh.

Complex Cases: The novel typically features intricate and multilayered cases, challenging the detectives' intellect and investigative skills.

Clash of Personalities: The dynamic between Frey, the logical and sophisticated detective, and McGray, the intuitive and rugged counterpart, brings a clash of personalities, which adds tension and humor to the storyline.

Series Continuity: "A Fever of the Blood" is part of a series, allowing readers to follow the ongoing adventures and character development of Frey and McGray across multiple novels.