The Actual Star, by Monica Byrne
The Actual Star is about many things: climate change, the tourist gaze, love, sex, entropy, utopias, the fall of the Maya, whether the Maya ever actually "fell," religious ritual, reincarnation, and caves. It's a big book, demanding and sometimes fussy in its careful construction. But it'll make you think, and the ending feels like putting your hand on a cave wall and feeling the heartbeat of the world through the rock. "Actual star"--indeed.