This is How You Lose the Time War won both the Hugo and Nebula Awards for Best Novella this year, limited to works that run between 17,500 and 40,000 words, among the many plaudits for its unusual call-and-response structure and its commentary on war. Written by Amal el-Mohtar and Max Gladstone, the book follows two time-traveling soldiers on opposite sides of an interdimensional war who find common threads between them and eventually fall in love through their letters to one another.

The only names we get for those two soldiers are Red and Blue, although they’ll refer to each other by various puns and nicknames as their relationship moves from taunting to affection over the course of the novel. The nature of the war they’re fighting is never quite clear, other than that they both seek to alter the courses of history in various instances of the multiverse by changing single events that will ripple forward in a sound-of-thunder-like pattern to enact massive changes in societies, civilizations, and even entire species. They go about implementing those changes in different ways, but they seem to be assigned to similar or related tasks, so their paths nearly cross multiple times, which allows them to start communicating with each other, secretly, in strange and incredibly imaginative ways.

They are, of course, being watched at the same time, by shadowy presences and interdimensional seekers, spies who want to decode Red and Blue’s missives to one another, and eventually that matter has to come to a head to provide some narrative thrust to the story. How the two figure this out and plot a way to escape their pursuers and fool their bosses, which risks splitting them apart forever, is the real purpose of the story, since we never get that much sense or meaning of what exactly the two sides want from the Time War.

This is How You Lose the Time War is a slow burn despite its short duration. The prose isn’t easy; both authors jump right into the new vernacular of their multiverse, and it teeters on the edge of the ridiculous for a while before the plot comes along to subsume any concerns you might have about word choices or syntax. There’s also a leap, pun intended, when Red and Blue go from rivalry to deep affection in the span of just a few letters; it felt incredibly sudden, as if the mutual respect they develop on the temporal battlefield was enough to make them fall in love with each other, visible in the abrupt shift in the language and tone of their notes.

It’s hard to entirely buy why they fall so hard for one another, but the payoff is strong; it feels like the two authors needed the first half of the book to find a shared rhythm, and once they got it, they could both put their feet on the gas. I didn’t quite buy how they fell in love, but once Red and Blue are there, and their budding relationship is threatened by the powers that be (were, will be, always are?) in their timelines, it’s credible and compelling – and the way it ends is satisfying and avoids the too-predictable traps into which the authors might have fallen. The novella is probably my least favorite format of prose fiction, compared at least to novels and short stories, but This is How You Lose the Time War felt like it was just the right length, and the way the two authors intertwine their voices produces a remarkable, emotional book.

Next up: I’ve already finished N.K. Jemisin’s The City We Became and moved on to Jessica Luther and Kavitha Davidson’s Loving Sports When They Don’t Love You Back.