Just finished _Gideon the Ninth_ by Tamsyn Muir, enjoying it thoroughly.
The description "Lesbian necromancers in space" illuminates the setting created here as meagerly as a keyring flashlight with a dying battery fills an auditorium in a power outage...
I'm committed to finishing any further books in the series, if only to learn of the arcane apocalypse which turned our world into this magic-infused scatter that makes Warhammer 40K feel buoyant and optimistic.