Piranesi

It's incredible how much Clarke does with so little in this book. It largely takes place in a single setting, following only one character, but it's completely gripping. It's masterfully written, especially in the way that Clarke simultaneously shows you things from Piranesi's perspective and objectively. The labyrinth is beautifully realized, a setting that will stick with me for a long time, and Piranesi's voice is just as unforgettable.