I have to applaud R. F. Kuang's PR team. Within the same week, I got 3 magazines in my mailbox with a profile of her: The New Yorker, The Atlantic, and Outside Magazine (!!). This was all done in coordination with the launch of her new book, Katabasis.
R. F. Kuang's superpower is skating to where public attention will be. Yellowface, for instance was about cultural misappropriation, and Katabasis is about graduate school (and University as well) as hell, timed to coincide with the decline of public support of elite Universities. Set in Cambridge (keep in mind that Kuang despite having 4 degrees is going for yet another PhD, so she's spent essentially all her life in one school or another), the universe of Katabasis is an alternate world in which magic and the study of it is a defined rigorous subject in academia, and the protagonist, Alice Law, is a graduate student under a demanding supervising professor. When that supervisor dies in a research accident, she decides the only thing to do is to go to hell and retrieve him. The other student Professor Grimes supervises also decides to join her.
This is by far the weakest link in the story. The cost of visiting hell is high (half your remaining life), and while Alice Law might have had sufficient motiviation to recover Grimes (her hatred for him is revealed later in the book), the after-recovery plan stinks and makes no sense. In fact, this aspect of the book smells a bit like an autobiography, complete with R. F. Kuang's in-real-life husband (who does suffer from a similarly dehibilitating condition) playing the role of Peter Murdoch.
The depiction of hell is kinda bland and boring. That's probably because no matter how Kuang tries to depict it, academia isn't actually hellish. Think about it: people willingly give up additional 4-6 years of their lives at low pay for a chance to get a tenure track position. If it was truly hell, you would have to pay more to get less talented people, but many of the brightest people in the world sacrifice so much to live their lives at University, and as one of my academic friends once said, "Being a tenured professor means you get to work on whatever you want which is like being retired already."
As a fantasy novel, I'm not sure Katabasis works. The problem with writers who come from out of genre to write fantasy and science fiction, is that they tend to write magic as a form of deus ex machina. There are no rules, anything goes, and so whatever happens in the novel is whatever the author can think up. This is fine if you're telling a bedtime story to a 3 or 5 year old. In a full length novel, what happens is that the reader feels that the author is unfair and there was no way for you to have seen the ending coming (especially since in this case the ending comes in the form of a gift from a character Alice Law betrayed!).
The way to predict the novel's ending, of course, is through meta-cognition --- you knew that R. F. Kuang married her husband, so the ending must involve Alice Law rescuing Peter Murdoch and them getting to live happily ever after. I guess that's why Kuang's PR team landed all those profiles of her in various magazines --- so you might not come away after reading the book feeling cheated.