Bluets
The most powerful fiction I read this year (and in a very long time), Bluets felt more like an extended lyric poem than an actual book. Nelson confesses, at the beginning of the book, that the goal of the work is to be a compendium of the color blue: her result, if not quite that, is a discourse on hope and hopelessness, the sense of being filled and the sense of being emptied. It is an utterly unique work of art.