Gideon the Ninth

The Pitch That Should Not Work

Here is the pitch for Gideon the Ninth: In the far future, humanity lives under the dominion of a necromantic space empire. Nine noble houses send their necromancers to a death competition in a decaying gothic mansion-planet. The sword-wielding servant of the Ninth House — foul-mouthed, irreverent, obsessed with vintage girlie magazines and possessed of extraordinary fighting ability — reluctantly accompanies her necromancer to a tournament that is also a murder mystery.

The necromancer is Harrowhark Nonagesimus. The servant is Gideon Nav.

The novel is narrated in a voice that mixes archaic imperial formality with extremely contemporary slang. It is simultaneously a gothic horror novel, a murder mystery, a fantasy novel, a queer love story, and a comedy.

This should not work. It absolutely works.

Voice as the Novel’s Superpower

Tamsyn Muir’s achievement with Gideon the Ninth is primarily a voice achievement. Gideon’s narration is one of the most distinctive in recent genre fiction — a voice that is sardonic and self-aware and funny while also being genuinely responsive to the horror around it. She is the kind of protagonist who, when confronted with terrible revelations, responds with the exact mixture of denial and inappropriate humour that actual people use to cope with terrible things.

The tonal mixture Muir achieves — gothic atmosphere, brutal violence, genuine emotional stakes, and constant low-grade comedy — should collapse under its own contradictions. Instead it holds, because Gideon’s voice is the glue. She is always honest about what she sees, what she feels, and what she’s pretending not to feel, and that honesty makes everything else credible.

The Mystery at the Centre

The novel’s mystery plot is structured with more care than most readers realise on first reading. The nine houses have been brought to the First House for a purpose: to unlock the secret of the necromantic empire’s most powerful magic, the lyctoral process. To do that, each necromancer and their cavalier must solve a series of locked-room challenges. Then bodies start appearing, and the challenges become secondary.

Muir plays fair with the mystery elements. The clues are present. The solution is logical. The reveal lands with the force of something that was inevitable rather than contrived — a quality that distinguishes genuinely good mysteries from merely entertaining ones.

Gideon and Harrowhark

At the heart of the novel is the relationship between Gideon and Harrowhark, who have a history of mutual hostility that has calcified into something more complicated over decades of forced proximity. Harrowhark is cold, brilliant, and completely committed to a goal that Gideon only gradually understands. Gideon is warm where Harrowhark is cold, impulsive where she is calculating, and exhaustingly present where Harrowhark is a master of emotional suppression.

Their dynamic is the engine of the series that follows, and Muir establishes it with precision. The hostility is real. The dependence is real. What’s growing underneath both of those is real, and it takes the entire series to resolve.

The Worldbuilding: Immersive and Initially Overwhelming

Gideon the Ninth drops readers into a fully realised world without explanatory handholding. The Nine Houses, their structure, their history, the nature of thanergy and thalergy, the lyctoral process — these are established through immersion rather than exposition. For some readers this is a feature; for others it’s a frustrating bug.

The advice for approaching the novel is to trust the process. The worldbuilding becomes clear through accumulation, and by the midpoint of the novel the initially opaque elements have all acquired meaning. A second reading, knowing where things are going, reveals how much information was present all along.

Why It Matters for Fantasy

Gideon the Ninth is significant beyond its individual merits because it demonstrated that the conventions of fantasy fiction are more flexible than the genre had been assuming. The voice register alone — contemporary-sounding dialogue in a far-future setting — felt like a violation of received genre wisdom and turned out to be a revelation. The novel won the Locus Award for Best First Novel and was nominated for a Hugo, and its influence on subsequent fantasy is already visible.

More than that, it created an enormous readership for Muir’s subsequent books by delivering an experience that felt genuinely new: a novel that found its genre rules only after deciding which ones to break, and that broke them not through ignorance but through mastery.

Our rating: 4.5/5 — One of the most original fantasy novels in recent memory. The voice is singular, the mystery is fair, and the relationship at its heart will stay with you.