Like Tress, this book contains a number of Cosmere in-references and features Hoid as the narrator. Pretty quickly you find that Hoid has found himself in yet another ridiculous situation where he's incapacitated in some way (like Tress), but he's unable to act in this one (unlike Tress). Taking Hoid's place in the role of "mentor" is Design, the cryptic that Hoid picked up in the Stormlight Archives. Now she's a buxom woman now (or rather, the illusion of a buxom woman) with "definitely very human mannerisms". I enjoyed her persona here, it provided the comic relief as a stand-in for Hoid. They really are made for each other.

The ideas behind how the Nightmares work and how the world functions really didn't make sense to me at first, but when the reveal comes at the end of the novel it all satisfyingly clicked into place. Like, in the initial chapters, I was wondering if it was tidally locked, but turns out, no.

Other thoughts:

The moral lesson / Painter's growth was good. He did that thing again where he has a character plainly lay out the backstory which is useful, but I'm not a big fan of that. The third viewpoint character (who didn't really get any viewpoint scenes) was nice, I enjoyed her. The reference to Threndony was A+.