Gideon the Ninth book cover

Gideon the Ninth

Tamsyn Muir
4.19 (174464 Reviews)

Overview of Gideon the Ninth

Lesbian necromancers in space! Tamsyn Muir's genre-bending masterpiece blends sci-fi, fantasy, and murder mystery into a cult phenomenon that was a Hugo Award finalist. Adri Joy called it "the queer necromantic murder mystery you've been missing all your life."

Key Themes in Gideon the Ninth

  • necromantic ritual
  • indentured service
  • gothic space opera
  • enemies to allies
  • ancient mystery trials

Quotes from Gideon the Ninth

  • Gideon Nav, Ninth House cavalier, did not recoil from a challenge.

  • One flesh, one end.

  • Their relationship is defined by mutual loathing.

  • The competition quickly becomes a race.

  • The murders transform the competition into something far darker.

Characters in Gideon the Ninth

  • Gideon NavA sword-wielding orphan and indentured cavalier
  • Harrowhark NonagesimusHeir to the Ninth House and necromantic prodigy
  • TeacherThe elderly host and guide at Canaan House
  • Magnus QuinnCavalier of the Fifth House and murder victim
  • Abigail PentNecromancer of the Fifth House and murder victim

About the Author

About the Author of Gideon the Ninth

Tamsyn Elizabeth Muir, the New Zealand-born speculative fiction writer, is the bestselling author of Gideon the Ninth and the acclaimed Locked Tomb series. She is celebrated for blending science fantasy, horror, and dark humor in her unique storytelling.

A 2010 graduate of the prestigious Clarion Writers Workshop, Muir draws on her Roman Catholic upbringing and LGBTQ+ identity to craft narratives rich in themes of sacrifice, religious devotion, and morally complex relationships. Her debut novel Gideon the Ninth (2019) won the Locus Award for Best First Novel and became a Nebula Award finalist. It launched a genre-defying trilogy that continues with Harrow the Ninth and Alecto the Ninth.

Before becoming a full-time writer, Muir taught English and ESL, experience that informs her sharp dialogue and character-driven storytelling. Her short fiction, including Shirley Jackson Award finalist “The Magician’s Apprentice” and World Fantasy-nominated “The Deepwater Bride,” established her reputation for intricate worldbuilding. Now based in Oxford, UK, Muir’s work has been translated into over 20 languages, with The Locked Tomb series optioned for television adaptation.

Download Summary of Gideon the Ninth

Get the Gideon the Ninth summary as a free PDF or EPUB. Print it or read offline anytime.

FAQs About This Book

Gideon the Ninth follows eighteen-year-old Gideon Nav, a sword-wielding orphan trapped in the Ninth House, a decaying necromantic cult guarding a mysterious Locked Tomb. When rival houses gather for a deadly competition to serve the Emperor, Gideon becomes cavalier to her nemesis Harrowhark Nonagesimus, navigating lethal trials, bone magic, and political intrigue. The novel blends gothic sci-fi, dark humor, and queer romance amid skeletons and cosmic horror.

Fans of genre-blending stories will enjoy this mix of sci-fi, fantasy, and horror. Ideal for readers seeking LGBTQ+ representation (featuring a lesbian protagonist), intricate world-building, and witty dialogue. Those comfortable with nonlinear plots and necromantic themes will appreciate its uniqueness, though it may challenge readers preferring straightforward narratives.

Yes, for readers who enjoy bold, unconventional storytelling. While some criticize its convoluted plot, others praise its originality, dark humor, and emotional depth. The sequel, Harrow the Ninth, has stronger acclaim, making this a compelling entry into Muir’s Locked Tomb series.

  • Identity and loyalty: Gideon’s struggle for autonomy vs. duty to Harrow.
  • Isolation: The Ninth House’s decline and Harrow’s secret burdens.
  • Sacrifice: Human costs of necromancy, explored through Harrow’s tragic past.
  • Queer resilience: Gideon’s defiance and relationships subvert traditional tropes.

The novel merges gothic horror (haunted mansions, skeletal constructs), space opera (interplanetary politics), and dark comedy (Gideon’s sarcastic narration). Muir juxtaposes sword fights with necromantic puzzles, creating a tone both macabre and irreverent.

Some readers find the plot disjointed and world-building overly complex. The middle section drags before accelerating into a violent climax. However, its bold voice and emotional payoff polarize critics—hailed as “brutally imaginative” by fans but “messy” by detractors.

Harrowhark is the Reverend Daughter of the Ninth House, a genius necromancer burdened by guilt after her parents’ suicides. Her fraught dynamic with Gideon evolves from rivalry to reluctant alliance, driven by shared trauma and Harrow’s secret love for the Locked Tomb’s occupant.

The Tomb contains a mysterious figure Harrow idolizes, central to the Ninth House’s purpose. Its secrets tie into the Emperor’s immortality and a pivotal sacrifice involving Gideon’s past, revealed in the climax.

Gideon’s lesbian identity is woven organically into her character—highlighted through her crush on Dulcinea and wry observations. The novel avoids tokenism, presenting queerness as intrinsic to its world.

This tagline captures its premise: Gideon and Harrow’s enemies-to-allies arc unfolds in a cosmic gothic setting, combining swashbuckling action with necromantic rituals. The phrase emphasizes its unapologetic queer themes and genre mashup.

The shocking finale reveals existential threats to the Emperor and Harrow’s unresolved connection to the Tomb. Gideon’s fate leaves room for metaphysical twists in Harrow the Ninth, which expands the series’ scope.

Yes—its themes of resilience and defying oppressive systems resonate amid contemporary conversations about identity and power. The series’ cult following ensures ongoing discussions, aided by the 2024 Alecto the Ninth release.

Explore Your Way of Learning

Gideon the Ninth isn't just a book — it's a masterclass in Science. To help you absorb its lessons in the way that works best for you, we offer five unique learning modes. Whether you're a deep thinker, a fast learner, or a story lover, there's a mode designed to fit your style.

Quick Summary Mode

Read or listen to Gideon the Ninth Summary in 8 Minutes

Break down key ideas from Gideon the Ninth into bite-sized takeaways to understand how innovative teams create, collaborate, and grow.

play
00:00
00:00

Fun Mode

Gideon the Ninth Lessons Told Through 21-Min Stories

Experience Gideon the Ninth through vivid storytelling that turns innovation lessons into moments you'll remember and apply.

play
00:00
00:00

Personalize Mode

Experience Gideon the Ninth in your own learning style

Ask anything, choose your learning style, and co-create insights that truly resonate with you.

Personalize Mode

From Columbia University alumni built in San Francisco

BeFreed Brings Together A Global Community Of 1,000,000 Curious Minds

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn
platform
star
star
star
star
star

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA
platform
comments
12
likes
117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw
platform
star
star
star
star
star

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum
platform
comments
12
likes
108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC
platform
comments
254
likes
17

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore
platform
star
star
star
star
star

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful
platform
comments
96
likes
4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP
platform
star
star
star
star
star

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon
platform
comments
201
thumbsUp
16

"It is great for me to learn something from the book without reading it."

@OojasSalunke
platform
star
star
star
star
star

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn
platform
comments
37
likes
483

"Makes me feel smarter every time before going to work"

@Cashflowbubu
platform
star
star
star
star
star

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn
platform
star
star
star
star
star

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA
platform
comments
12
likes
117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw
platform
star
star
star
star
star

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum
platform
comments
12
likes
108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC
platform
comments
254
likes
17

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore
platform
star
star
star
star
star

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful
platform
comments
96
likes
4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP
platform
star
star
star
star
star

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon
platform
comments
201
thumbsUp
16

"It is great for me to learn something from the book without reading it."

@OojasSalunke
platform
star
star
star
star
star

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn
platform
comments
37
likes
483

"Makes me feel smarter every time before going to work"

@Cashflowbubu
platform
star
star
star
star
star

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn
platform
star
star
star
star
star

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA
platform
comments
12
likes
117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw
platform
star
star
star
star
star

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum
platform
comments
12
likes
108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC
platform
comments
254
likes
17

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore
platform
star
star
star
star
star

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful
platform
comments
96
likes
4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP
platform
star
star
star
star
star

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon
platform
comments
201
thumbsUp
16

"It is great for me to learn something from the book without reading it."

@OojasSalunke
platform
star
star
star
star
star

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn
platform
comments
37
likes
483

"Makes me feel smarter every time before going to work"

@Cashflowbubu
platform
star
star
star
star
star

See More Stories?

How people are talking about BeFreed across the web
1.5K Ratings4.7
Start your learning journey, now