This is How You Lose the Time War by Amal El-Mohtar & Max Gladstone
Recommended by Dan B:
I’m not ordinarily a romance reader, but luckily this is no ordinary romance! An atmospheric tale of a cat and mouse across time and space, there are hints of worlds both crazy and familiar, and poetic license invoked on every page. This is a quick read, and I lost myself in the beauty and sentimentality of the story.