TL;DR: "It's like, how much more goth could this be? And the answer is none. None more goth." Oh. Highly recommended.
HAIL! Hail the Emperor Undying, the God of the Resurrection, the Kindly Prince, King Everlasting, Lord of the Sharpest Edge, the First Reborn and the Necrolord Prime! Hail to his Lyctors, his fingers and fists, his immortal sainted chosen! Hail to his Nine Houses, which hang about the star Dominicus, and his Cohorts and Legions as they spread across the galaxy!
In the ten-thousandath year of the reign of the Emperor Undying, Gideon Nav was packing her sword, her shades, and her dirty magazines to make good her eighty-seventh escape attempt from the Ninth House.
So, here's the god's honest truth; I read Gideon the Ninth significantly on a "Well, everyone else is talking about it, it must be good", and was... vexed and confused for like, the first half of the novel. The second half was good, but I was still left with a lot of confusion and vexation with the conclusion. I was carried along in significant part by Gideon being an excellent snarker. She's a Brujah in a world of Ventrue and Tremere. (In terms of attitude. In terms of magical bullshit, everyone is some flavor of Giovanni)
I'm normally a pretty fast reader, but it took a solid month to march through. Even after it began to pick up, I really only started to fly towards the very end.
After finishing, I put Gideon down, and was like "Well, that was interesting", and moved on.
Important thing to note: Devotees from the Ninth House dress all in black, and use makeup to paint freaking Dios De Los Muertas skulls on their faces. You hang out with them for long enough to just start thinking that "Oh, this must be what the future is like", but no! Fucking NO ONE ELSE does this, and most folks look at Gideon and Harrow's getup with some serious 'Are you for real' energy.
None. None more goth. (They also specialize in animating skeletons to do all their labor, but it's the face paint that really puts them over the top)
Some months later, you picked up Harrow the Ninth. Harrow, in the first book, is Gideon's closest friend and absolute worst enemy in the world (excepting possibly herself). A frail, genius necromancer, she becomes the viewpoint character of the story- which you think should help things make more sense, but no! A great deal of the confusion in the first book comes from being thrown headfirst into a world of Magical Bullshit in the head of someone neither knows nor cares about any of it, and so you think that being in the head of someone hip deep in the Magical Bullshit would help. But no! Instead, you discover entirely new DEPTHS of magical bullshit, the likes of which could hardly have been imagined before! Also, and this is important, Harrow the Ninth is written almost entirely in second person. So, at first, you probably assume this is just some kind of weird narrative conceit, or something Muir did after losing a bet, or while drunk, or having lost a bet while drunk. Until the moment you realize that no, it's all an ELABORATE PLOY! And that only distracts you from the OTHER ELABORATE PLOY!
Harrow the Ninth took maybe two weeks to read; most of that was just kind of finding the grove, cause once it takes off, you can't put it down. And it finds that grove faster and with greater confidence.
I had fortunately picked up Nona the Ninth earlier, so I didn't have to wait between finishing Harrow and starting Nona.
The literal only complaint I have about Nona the Ninth is that I was extremely confused as to how we got from the end of Harrow to the beginning of Nona, and that doesn't become... like, super clear through the rest of the book.
On the other hand, it's also the first time we kind of see the Nine Houses from the common man's view. And a great deal of things that had been only suggested before starting being stated outright, or at least waggling their eyebrows and pointing empathically.
Additionally, Nona is maybe the hardest character to write; a perfectly innocent cinnamon roll who charms both everyone around her and the reader. Because of her, I flew through the book in like, two, three days.
It's hard to say more about Nona the Ninth without getting into spoiler territory for the rest of the series tho, so I won't.
Wait, I will say one other thing. Muir makes a "Then Perish" meme reference.
There is a mistake, I think, that many authors can stumble into. A mistake of world building for the sake of world building. They look at Tolkien embroidering every stream and leaf and think "Yeah. I can do that." First, no you can't. Second, you probably shouldn't even if you think you can. Because a great deal of that embroidery is fat that a better editor would flence from the bones before boiling them, animating them, and leaving the bleached skeleton to work in the fields. But sometimes, you only think it's fat. Sometimes, it's marrow; which kind of looks like fat to the untrained eye, but which is rich, and dense, and produces the blood that pumps in ten thousand miles of veins and capillaries and which, under the appropriate circumstance, will sometimes explode.
Gideon the Ninth, at first, seems like a fatty book.
Until it explodes.
Alecto the Ninth can't come out soon enough. Until then, I'm planning at least one full re-read, to see if Gideon is better when it makes any kind of sense from the get-go.
(If there isn't a reference to threatening a mushroom for the secret name of god, because decay exists as an extant form of life, I will be very sad)