Gideon the Ninth is this wild, gothic sci-fi mashup that feels like someone threw a skeleton rave into a haunted house and added swords. The story follows Gideon Nav, a snarky, sunglasses-wearing orphan with a serious sword obsession, who’s stuck serving the Ninth House—a death-obsessed necromantic cult. When the Emperor invites the heirs of all eight Houses to compete for immortality, Gideon gets dragged along as the cavalier (bodyguard) to her nemesis, Harrowhark Nonagesimus, the Ninth’s bone-witch heir. The vibe? Claustrophobic space castle full of puzzles, murder, and skeletons—so many skeletons. The duo’s toxic frenemy dynamic is hilarious and heartbreaking, especially as the competition turns deadly and secrets unravel. What starts as a locked-room mystery spirals into cosmic horror, with betrayals, necromantic power plays, and a finale that’ll leave you screaming. Muir’s writing is dense with memes, Latin, and sword lesbians—it’s like if 'The Locked Tomb' was a Tumblr thread come to life.
Honestly, the plot’s hard to pin down because it’s constantly subverting expectations. One minute it’s a dark comedy about Gideon’s grumpy inner monologue, the next it’s a tragedy about loyalty and godhood. The magic system? Necromancy with bone constructs, soul shenanigans, and a lot of gross body horror. The setting? A decaying space empire where everyone’s either a goth or a himbo. I adore how Muir blends genres—part murder mystery, part queer romance, part existential nightmare. The ending’s a gut punch, but it makes the rereads even more rewarding when you spot the foreshadowing hidden in Gideon’s jokes.