John C. Fremont was the most celebrated explorer of his era. In 1842, on the first of five expeditions he would lead to the Far West, Fremont and a small party of men journeyed up the Kansas and Platte Rivers to the Wind River Range in Wyoming. At the time, virtually this entire region was known as the Great Desert, and many Americans viewed it and the Rocky Mountains beyond as natural barriers to the United States. After Congress published Fremont's official report of the expedition, however, few doubted the nation should expand to the Pacific. The first in-depth study of this remarkable report, Sight Unseen argues that Fremont used both a radical form of art and an imaginary map to create an aesthetic desire for expansion. He not only redefined the Great Desert as a novel and complex environment, but on a summit of the Wind River Range, he envisioned the Continental Divide as a feature that would unify rather than impede a larger nation. In addition to provoking the great migration to Oregon and providing an aesthetic justification for the National Park system, Fremont's report profoundly altered American views of geography, progress, and the need for a transcontinental railroad. By helping to shape the very notion of Manifest Destiny, the report became one of the most important documents in the history of American landscape.

Learning from Thoreau is an intimate intellectual walk with America's most edgy and original environmentalist. The thrust of the book consists not in learning "about" Thoreau from an intermediary but, as the title suggests, in learning "from" Thoreau along with the author-whose lifelong engagement with this "genius of the natural world" leads him to examine the process of learning from an admired model. Using both images and text, Andrew Menard offers a personal meditation on Thoreau's thought, its originality, and its influence on the modern environmental movement. He places Thoreau in dialogue with contemporary artists and thinkers and associates him with a rich variety of places: Walden Pond, the Museum of Modern Art, the Rockefeller State Park Preserve in upstate New York, Mormon Mesa northeast of Las Vegas, and the old town of Koenigsberg, Prussia. Each place, each experience, each writer, and each work of art provides a different line of approach. The author also leads us through an expanding and deepening series of keywords that trigger fresh occasions to learn from Thoreau: Concord, Walden, walking, seeing, nature, wildness, beauty. The result is a deeply nuanced and informed portrait of Thoreau's inner and outer landscape.