Andrew Treloar's Textus Haereticorum is a bold, intellectually ambitious thriller that fuses academic intrigue, historical conspiracy, and a dash of existential weariness into a compelling narrative. The novel follows Professor Alex Carey, a disillusioned but sharp-witted historian at Northern Arizona University, as he's drawn into a labyrinthine mystery triggered by the arrival of an enigmatic, centuries-old letter sealed with an untraceable ecclesiastical crest. Carey, with the help of his brilliant graduate student Claire Marlowe, embarks on a quest that takes them from dusty lecture halls to the shadowy crypts of Europe, unraveling layers of religious and political secrets that threaten to upend the very foundations of Christian history. Treloar's prose is atmospheric and richly detailed. He excels at evoking the tactile reality of academia-the battered satchels, the flickering lights, the scent of dry marker and old books-while simultaneously imbuing the story with a sense of high-stakes urgency. The dialogue is crisp and authentic, especially in the exchanges between Carey and Marlowe, whose mentor-mentee dynamic is both believable and emotionally resonant. The supporting cast, including shadowy Vatican operatives and secretive monastic orders, are sketched with enough depth to avoid caricature, lending weight to the novel's conspiratorial undertones. What sets Textus Haereticorum apart is its fearless engagement with heretical possibilities. The narrative doesn't shy away from challenging orthodoxies, presenting a plausible, meticulously researched alternative history in which Judas is recast not as traitor but as savior, and Jesus' fate diverges radically from canonical accounts. Treloar's handling of these revelations is deft-he balances scholarly skepticism with genuine wonder, allowing the reader to inhabit the thrill of discovery alongside his protagonists. At nearly 400 pages, the novel is dense but rarely drags. Some readers may find the historical exposition heavy at times, but for those who relish the intersection of history, theology, and suspense, Textus Haereticorum is a rewarding, provocative read. It's a thinking person's thriller-one that lingers in the mind long after the final page.