Our Take
This novella punches well above its 200 pages. El-Mohtar and Gladstone split writing duties between the two leads, and the seams barely show, each voice distinct but woven into something cohesive and strange. It's less interested in the mechanics of time travel than in what longing does to language, and the prose gets genuinely gorgeous, sometimes almost too rich, but it earns the indulgence. If you liked the melancholy, structure-bending romance of Sea of Tranquility, or the lyrical world hopping of Piranesi, this will scratch a similar itch, though it's far more overtly a love story than either. There's also a kinship with The Night Circus in how it prioritizes atmosphere and yearning over hard plotting. The ending will not be for everyone. Some readers want more resolution than they get, and the time war's rules stay deliberately hazy throughout. But if you're willing to meet it on its own terms, as a poem disguised as a spy novel, it's one of the most emotionally effective short reads in recent sci-fi. Give yourself an afternoon, because once you start the correspondence between Red and Blue, you won't want to put it down until you reach the last line.
