In the mid-1970s, scientists began using DNA sequences to reexamine the history of all life. Perhaps the most startling discovery to come out of this new field—the study of life’s diversity and relatedness at the molecular level—is horizontal gene transfer (HGT), or the movement of genes across species lines. It turns out that HGT has been widespread and important. For instance, we now know that roughly eight percent of the human genome arrived not through traditional inheritance from directly ancestral forms, but sideways by viral infection—a type of HGT.David Quammen chronicles these discoveries through the lives of the researchers who made them—such as Carl Woese, the most important little-known biologist of the twentieth century; Lynn Margulis, the notorious maverick whose wild ideas about “mosaic” creatures proved to be true; and Tsutomu Wantanabe, who discovered that the scourge of antibiotic-resistant bacteria is a direct result of horizontal gene transfer, bringing the deep study of genome histories to bear on a global crisis in public health.

    For over 100 years the community orbited around a paper mill that employs most townspeople, including three generations of Arsenault’s own family. Years after she moved away, Arsenault realized the price she paid for her seemingly secure childhood. The mill, while providing livelihoods for nearly everyone, also contributed to the destruction of the environment and the decline of the town’s economic, physical, and emotional health in a slow-moving catastrophe, earning the area the nickname “Cancer Valley.” Mill Town is an personal investigation, where Arsenault sifts through historical archives and scientific reports, talks to family and neighbors, and examines her own childhood to illuminate the rise and collapse of the working-class, the hazards of loving and leaving home, and the ambiguous nature of toxics and disease. Mill Town is a moral wake-up call that asks, Whose lives are we willing to sacrifice for our own survival?

    The northern border was America’s primary border for centuries—much of the early history of the United States took place there—and to the tens of millions who live and work near the line, the region even has its own name: the northland.Travel writer Porter Fox spent three years exploring 4,000 miles of the border between Maine and Washington, traveling by canoe, freighter, car, and foot. In Northland, he blends a deeply reported and beautifully written story of the region’s history with a riveting account of his travels. Setting out from the easternmost point in the mainland United States, Fox follows explorer Samuel de Champlain’s adventures across the Northeast; recounts the rise and fall of the timber, iron, and rail industries; crosses the Great Lakes on a freighter; tracks America’s fur traders through the Boundary Waters; and traces the forty-ninth parallel from Minnesota to the Pacific Ocean.Fox, who grew up the son of a boat-builder in Maine’s northland, packs his narrative with colorful characters (Captain Meriwether Lewis, railroad tycoon James J. Hill, Chief Red Cloud of the Lakota Sioux) and extraordinary landscapes (Glacier National Park, the Northwest Angle, Washington’s North Cascades). He weaves in his encounters with residents, border guards, Indian activists, and militia leaders to give a dynamic portrait of the northland today, wracked by climate change, water wars, oil booms, and border security.