About chapter 15:
The tunnels under Kyudea and Ishuäl are referred to as similar in architecture, and then as Nonman work.
For Kyudea it is confirmed to be Nonman architecture. I can't remember: Do we know this to be the case for Ishuäl as well?

We don't know it for sure, but I think it is fair the read it in, since Ishuäl is an Ihrimsû name, meaning "Exalted Grotto."  Seems likely to me that the Kûniüric High Kings learned of it somehow, likely after it had ben abandoned by the Nonmen and then used it for their own purposes.  Meaning, of course, that the Thousand Thousand Halls were carved with some Nonman purpose, the Dûnyain only later found their own use for them.

TTT starts with full force in the quote and the Dream where Mekeritrig tortures Seswatha:

"To understand the soul of a Nonman, the philosopher Gotagga had once written, one need only bare the back of an old and arrogant slave. Scars. Scars upon scars. This was what made them mad. All of them."
[...]
"I will strip you to your footings", the Nonman grated. "Though I love,  I will upend your souls foundation! I will release you from the delusions of this word 'Man', and draw forth the beat - the soulless beast! - that is the howling Truth of all things..."

First the parallel with Cnaiür's scars and madness, of course. With that, does it somewhat insinuate that killing chips away at your sanity?
Secondly the illustration that if you take away one's humanity, a human is no different from a sranc?

The first passage that Esmenet reads from the Sagas. I'm pretty sure that I remember it being sung by the Nonman on the elevator in Ishterebinth, in TGO:

"Rage - Goddess! Sing of your flight,
From our fathers and our sons.
Away, Goddess! Secret your divinity!
From the conceit that makes kings of foods,
From the scrutiny that makes corpses of souls.
Sing us the end of your song. "

Conphas thinking before being brutalized by Cnaiür:

"Where the Nansur wheedled and negotiated, the Scylvendi simply took - seized. It was as though they had embraced violence as a whole, while the Nansur had shattered it into a thousand pieces to set as splinters across the multiform mosaic of their society.
It made them seem... more manly."

Again, the shattering of a "one into thousand" symbolism.

"Only when things were broken did their meaning become clear. "

This one struck me particularly with respect to the whole brutality that is inflicted on the Scalded in TUC.
At the same time, do I note aparallel between "meaning" and "Truth" in this? Both concepts are flung around a lot in this book. Only when a Truth or a meaning is broken, do we understand what it actually meant.

About chapter 15:
The tunnels under Kyudea and Ishuäl are referred to as similar in architecture, and then as Nonman work.
For Kyudea it is confirmed to be Nonman architecture. I can't remember: Do we know this to be the case for Ishuäl as well?
Is the whole Sorweel in the Ishterebinth underground meant to help understand the whole Dunyain journey here, with both Kellhus and the Siqu looking for their father?

Leviathan Falls by James S. A. Corey (1)

Hmm...  I was surprised to find myself not excited to read this conclusion to the series.  I liked the previous books pretty well, but maybe it had been too long before this one came out.  It could also be the time jump that occurred at book...7?  The plots and characters got spread out and disparate, and thus less compelling I think.

My biggest problem with this book was its pacing.  The beginning is kind of slow and aimless, then suddenly out of nowhere we are fighting for the very existence of humanity, which I knew was coming.  There is a very clear existential threat that has to be dealt with going into the book, but I just didn't like how the authors got around to dealing with it.  Some story elements got far out there, psychedelic, brief interludes of stream of consciousness kind of, I did not like it.  The Expanse is at its best when it deals with conflict between people, whether on a personal or planetary scale.  Going so far into the trippy mind alien realm just didn't work, it was better in previous books when it was just briefly touched on or alluded to. 

Overall, this is a fine conclusion to an otherwise great modern space epic.  The denouement was probably my favorite part.  I will say, throughout the whole series it is very clear this was lifted from/heavily-inspired by some sci-fi rpg session someone ran, not unlike Dragonlance is for D&D.  Characters have their clear class, traits, and alignments, and I found myself frequently thinking how a gamed session morphed itself into various scenes in the series.  It's still good, worth reading if you want a big sci-fi epic.

MSJ, both those series are on my list for the year.  Just started Senlin Ascends.

I did not read as much as I wanted last year.  Only 21 books, and I didn't hit much of what I expected to read either.  So this year, who knows?
The only sure thing is reading new KJ Parker, certainly a novella or two and a novel.  Aside from that, probably Abercrombie's latter trilogy, Babel books, Tad Williams's new Osten Ard, finishing Ruocchio's series.  All subject to change and be bumped at a whim.  Maybe this time next year I'll be reflecting on my deep dive into Amish romance novels; time will tell, all is in flux.

New year, new books! Or trying to finish old ones. Or rereads. Or...

This year I'm going to try to read more consistently. Despite reading 27 books, I didn't complete any books after August last year, which feels bad. Plenty of things I still want to read.

TBR:
Startide Rising by David Brin
Rage of Dragons by Evan Winter
Kushiel's Chosen by Jacqueline Carey
Dune by Herbert
Among Others by Jo Walton
The Torch that Ignites the Stars by Andrew Rowe
Unspoken Name by A K Larkwood
Traitor Son Cycle by Miles Cameron
Sixteen Ways to Defend a Walled City by KJ Parker
The Trouble with Peace by Joe Abercrombie
The Wisdom of Crowds Joe Abercrombie
The Fountains of Paradise by Arthur C. Clarke
The Forgotten Beasts of Eld by Patricia A. McKillip
Under Heaven by Guy Gavriel Kay

January (1)
1) Sixteen Ways to Defend a Walled City by KJ Parker

February (2)
1) The Dread Wyrm by Miles Cameron

March (3)
1) The Plague of Swords by Miles Cameron

April (6)
1) The Fall of Dragons by Miles Cameron
2) Project Hail Mary by Andy Weir
3) Unspoken Name by A K Larkwood

May (7)
1) The Trouble with Peace by Joe Abercrombie

June (10)
1) The Wisdom of Crowds Joe Abercrombie
2) The Fountains of Paradise by Arthur C. Clarke
3) The Forgotten Beasts of Eld by Patricia A. McKillip

Sep (12)
1) Nona the Ninth by Tamsyn Muir
2) Among Others by Jo Walton
x) Malice by John Gwynne DNF

Oct (15)
1) The Torch that Ignites the Stars by Andrew Rowe
2) Against All Gods by Miles Cameron
3) The Goblin Emperor

Nov (16)
1) Under Heaven by Guy Gavriel Kay