“Blood Tithe” follows the unconventional partnership between former Detective Constable Mick Hargraves and the ancient demon Marchosias as they investigate a series of deaths that appear unconnected but reveal a deeper pattern of corruption and supernatural vengeance. Set in contemporary London, the novel combines noir detective work with cosmic horror, creating a unique urban fantasy that explores the intersection between human justice and otherworldly retribution. When Mick encounters an ancient Sumerian binding stone during their investigation, Marchosias is suddenly silenced from his consciousness, leaving him vulnerable and alone for the first time in months as they face increasingly dangerous supernatural threats.
Working alongside Detective Inspector Diana Reeves, Mick must rely on conventional investigative methods to uncover the truth behind five mysterious deaths spanning several years. Their investigation leads them through London’s hidden occult underground—from abandoned bookshops filled with forbidden knowledge to supernatural nightclubs where demons broker dangerous information. As they piece together the connections between the victims, they discover the deaths are linked to a decades-old miscarriage of justice involving Thomas Harrington, an innocent young man wrongfully convicted and killed in prison. The case forces them to confront not only vengeful spirits and ancient demons, but also the institutional corruption that allowed an innocent to die.
The story deepens into a tale of a grieving father’s desperate bargain with supernatural forces, seeking justice for his son when the legal system failed. As Mick struggles to restore his connection with Marchosias while navigating increasingly perilous deals with dangerous entities, he and Reeves must stop a cycle of vengeance that threatens to consume far more than its original targets. The novel explores themes of justice versus vengeance, the price of supernatural bargains, and the complex relationship between human morality and demonic pragmatism, all while maintaining the visceral horror and psychological dread that defined the series’ debut.