New collections from Caitlin Maling and Kristen Lang are situated in vastly different landscapes but pursue similar ideas about the natural world’s fragility and the imminent environmental catastrophe. Maling’s Fish Work, as its title suggests, is primarily interested in marine life and the scientists studying it at Lizard Island Research Station on the Great Barrier Reef, while Lang’s Earth Dwellers explores mountains, caves, and coastlines in Tasmania and Nepal, examining the myriad complexities of ancient ecosystems. Maling’s and Lang’s new books, their fourth collections, urge readers to attend to the work of millennia that has produced these distinctive ecosystems and, in doing so, to appreciate the urgency of protecting them.