Very enjoyable, in the mode of an episodic addition to the Ancillary trilogy. Wears its Star Trek heart on its sleeve (DS9 I guess, more than TNG as in the earlier sequels to Ancillary Justice). As SF it has two very imaginative twists: in one case a literal twisting of space, in the other a metaphorically twisted (and gory) variation on personhood that would do Derek Parfit proud. Otherwise it’s fluffy and good-natured, with a lot of nice-guy characters. And at least four genders, but no biggie.