The imaginary aliens niche is much bigger per capita in the Imperium compared to Amenta, it seems. Much of the work is also BDSM-y, either totally or in part. Although that isn't considered a 'kink' here, it's kind of...normal. Here's a catalog with blurbs.
They find stuff with relatively little to no overt sexual content and put a catalog together. Zmavlimu'e fiction in general is characterized by very consistent theming and emotional valence, the absence of the concept of heros and villains (it's only protagonists and antagonists), lots of thought put into worldbuilding (many of which will have addenda elaborating on it, or perhaps even ancillary books), and growth/power fantasy/competence porn narratives. To an Amentan's eyes, Imperial fiction evokes 'yellow who wanted to get into fiction writing'.
Here's a hard sci-fi novel about people on a spaceship which had a breakdown, causing them to get stranded and have to work very carefully to survive and return home. The novel is...technically inaccurate, now that there's a literal spacefaring society here able to factcheck it, but the novel has great dramatic tension. Kind of tragic, though. Some people die. Many of the books, including this one, have an openable envelope containing potentially spoilery tags or content warnings, such as character death.
Here's a fantasy novel about people who get different magical powers with aptitudes in each one depending on their personality, and whose strength at the moment depends on what emotion they're currently expressing. There's a lot of interiority in the characters, and a lot of time is spent on digressions about mental exercises, many of which are lifted from or inspired by the Imperial Church's ritual and meditation teachings, and how the characters use those to cultivate their powers, and also how having to deliberately adopt certain patterns of thinking changes them, for better or for worse. Very power fantasy-y. Also very popular because Zmavlipre kind of like fiction that has categories like that, which causes everyone who likes that franchise to categorize all their friends according to it. It's kind of a cliche.