The Devil Aspect by Craig Russell is one of those novels that builds its horror from three directions at once: the patient on the couch, the monster loose in the city, and the catastrophe gathering at the edge of history. Set in 1935 Czechoslovakia, it sends young psychologist Viktor Košárek to Hrad Orlů, an asylum embedded in a mountain fortress above a Bohemian town. The institution holds six patients, all convicted of extraordinary violence, all claiming their crimes were committed by something inside them they call the Devil Aspect. Košárek's mission is to use the new techniques of depth psychology to extract and map this shared darkness. What Russell constructs around that premise is genuinely unsettling.
The asylum as a horror setting
Hrad Orlů is the best thing in the book. Russell designs the fortress with real spatial imagination: tiers of cells cut into the rock, fog that swallows the courtyard, a geography that makes escape feel not just difficult but cosmically impossible. The building behaves almost like a character, pressing down on every scene that takes place inside it. It belongs to a tradition of institutional horror, the kind that asks whether the walls meant to contain madness might instead concentrate it. The six patients, each given a code name drawn from folklore, are individually compelling. Russell resists making them sympathetic in easy ways. They're frightening, and the novel respects that.
Košárek's interviews with each patient follow a loose pattern: session, revelation, aftermath. Russell uses these scenes to deliver the book's most claustrophobic passages. One patient in particular, codenamed Laughing Cavalier, unsettles not through spectacle but through the quality of stillness Russell gives him. He sits, he speaks quietly, and the room feels smaller after every sentence. That's craft.
The parallel investigation
Running alongside the asylum plot is a police procedural. In Prague, detective Lukáš Smolák tracks a serial killer named Leather Apron who is gutting victims in the fog-bound streets. The two storylines are designed to converge, and any attentive reader will see the shape of that convergence early. Russell doesn't try to disguise it. The procedural is competent rather than remarkable. Smolák is a functional character, well-drawn but less interesting than Košárek, and the Prague scenes lack the pressure of the asylum chapters. They're a necessary scaffold, and Russell keeps them moving, but the book is at its best when it's underground.
The historical backdrop is where Russell earns something extra. The slow annexation of the Sudetenland, the Nazi Germany gathering on the border, the particular dread of a country watching its future be decided by others: Russell weaves all of this in without making it schematic. The political horror and the personal horror rhyme without one swallowing the other. By the final act, the external catastrophe has become part of the novel's texture rather than a backdrop prop. It's a harder trick than it looks, and Russell pulls it off.
Depth psychology and the devil
Russell positions Viktor Košárek as a student of both Jung and Freud, and the novel takes depth psychology seriously as a framework. The Devil Aspect of the title is partly the Jungian shadow made literal: the externalized repository of everything a person refuses to own. Russell doesn't force this into allegory. He lets the ambiguity do work. Are these six people possessed by a single ancient entity? Are they exploiting a shared myth to construct a legal defence? Is Košárek projecting his own darkness onto his patients? The novel holds all three possibilities open for longer than you'd expect, and that suspension is its sharpest horror tool.
There are moments where Russell tips the balance too far toward the supernatural without earning it. A late-novel sequence asks the reader to accept something that the book's own psychological logic resists. It isn't a dealbreaker, but it costs some of the hard-won ambiguity. Readers who prefer their horror locked firmly in the explicable may find the final movement frustrating. Readers who came for the mythos will find it satisfying. Russell is working in the same territory as T.E.D. Klein's slow-burn cosmic dread in The Ceremonies, where an ancient evil insinuates itself through the mundane and the institutional.
Prose and pacing
Russell's prose is clean and purposeful. He doesn't reach for baroque effects when plainness serves better. The Bohemian landscape comes through in short, sharp observations: the cold, the rock, the low sky. His pacing is confident in the first two-thirds, then accelerates sharply in the final act. The acceleration is exciting but slightly rough. A few revelations land before the reader has fully processed the one before. The novel could afford ten more pages in its final quarter.
That said, Russell handles the intercutting between Košárek and Smolák with enough rhythm that neither strand feels abandoned. The novel clocks in at just under 500 pages and earns most of them. It's the kind of book that rewards reading in long stretches. Each session with a patient ends on a detail or an image that lodges in the mind, and those images accumulate. By the third act, the asylum feels not just remembered but inhabited.
Who this is for
Readers who responded to the way Brian Evenson uses institutional religion to crack open identity in The Open Curtain will find something familiar in Russell's use of the psychiatric asylum. Both novels treat the apparatus meant to understand the human mind as itself a source of danger. The Devil Aspect is broader in scope and more conventionally plotted than Evenson's work, but it shares that interest in the diagnostic gaze as a horror premise.
Craig Russell has built a reputation on historical crime fiction, and The Devil Aspect shows what happens when that skill set turns toward horror. The research is rigorous without being displayed. The period detail holds. The moral weight of the historical moment gives the plot stakes that a purely supernatural thriller couldn't achieve. It's a strong novel with one soft act, and the soft act doesn't undo the work that came before it. Recommended, with the caveat that the closer Russell gets to resolution, the less interesting his choices become. The uncertainty is the best thing here. Hold onto it as long as you can.