Beautiful novella! A lot of it is very abstract, on purpose. Like, how unlikely is it that two agents from rivaling parties both name themselves after colours, Blue and Red? It doesn't matter. Neither do the specific missions. The war events. The time strands.
What does matter, are the letters they send each other. The Seeker following them everywhere, snorting teapots like cocaine. And how they lose and win the time war.
Bonus points for the writing method (the two authors wrote the letters to each other, one after another, and built the universe that way). Bonus points for wlw romance. Bonus points for singing Steven Universe songs while writing the book. Bonus points for posing with swords on the backcover photo.