Harrow the Ninth by Tamsyn Muir
First of all Harrow is not an easy read. It's absolutely necessary to read Gideon the Ninth first then take a short break before reading this one. At least, I had to take a break. I tried going from one right into the other and found I wasn't quite ready to immerse in that world again, but maybe that's just me. It's a dark, tense world and the writing style is very distinct, which is both good in the fact that it makes it mysterious and memorable, but also meant I needed a breather.
Harrow has become a lychtor, a superpowerful, immortal magical necromance knight to the Necrolord Prime, the Undying Emperor — we know that — probably. In the present, told in the second person, Harrow is having a tough time. While she is an amazing bone magician, she's finding the process of becoming a true lychtor difficult, if not impossible. Sadly enough, we have no Gideon here, just...
