The Locked Tomb,

A short story by Tamsyn Muir that takes place prior to the events in her The Locked Tomb Trilogy. "Each of the Empire’s houses keeps secrets, even from themselves. For the bookish academics of the Sixth, every secret is a mystery, and every mystery is a puzzle to be solved or a paper to be published. Deep in the bowels of their house, one such secret is about to reveal itself. The study of the famed academic Donald Sex, sealed since the moment of his death, is about to open, and archivists are ready to dissect what he left behind. They are not ready for the macabre surprise that awaits them. Enter Palamedes Sextus and Camilla Hect, age thirteen." --source: Tor.com This ebook is available for free on Tor.com

"The Emperor needs necromancers. The Ninth Necromancer needs a swordswoman. Gideon has a sword, some dirty magazines, and no more time for undead nonsense. Tamsyn Muir’s Gideon the Ninth unveils a solar system of swordplay, cut-throat politics, and lesbian necromancers. Her characters leap off the page, as skillfully animated as arcane revenants. The result is a heart-pounding epic science fantasy. Brought up by unfriendly, ossifying nuns, ancient retainers, and countless skeletons, Gideon is ready to abandon a life of servitude and an afterlife as a reanimated corpse. She packs up her sword, her shoes, and her dirty magazines, and prepares to launch her daring escape. But her childhood nemesis won’t set her free without a service. Harrowhark Nonagesimus, Reverend Daughter of the Ninth House and bone witch extraordinaire, has been summoned into action. The Emperor has invited the heirs to each of his loyal Houses to a deadly trial of wits and skill. If Harrowhark succeeds she will be become an immortal, all-powerful servant of the Resurrection, but no necromancer can ascend without their cavalier. Without Gideon’s sword, Harrow will fail, and the Ninth House will die. Of course, some things are better left dead."

Chronicles Judith Deuteros, Coronabeth Tridentarius, and Camilla Hect's time with Blood of Eden directly following the events of Gideon the Ninth.

Her city is under siege. The zombies are coming back. And all Nona wants is a birthday party. In many ways, Nona is like other people. She lives with her family, has a job at her local school, and loves walks on the beach and meeting new dogs. But Nona's not like other people. Six months ago she woke up in a stranger's body, and she's afraid she might have to give it back. The whole city is falling to pieces. A monstrous blue sphere hangs on the horizon, ready to tear the planet apart. Blood of Eden forces have surrounded the last Cohort facility and wait for the Emperor Undying to come calling. Their leaders want Nona to be the weapon that will save them from the Nine Houses. Nona would prefer to live an ordinary life with the people she loves, with Pyrrha and Camilla and Palamedes, but she also knows that nothing lasts forever. And each night, Nona dreams of a woman with a skull-painted face...