In 1803, President Thomas Jefferson selected his personal secretary, Captain Meriwether Lewis, to lead a voyage up the Missouri River, across the forbidding Rockies, and - by way of the Snake and the Columbia rivers - down to the Pacific Ocean. Lewis and his partner, Captain William Clark, endured incredible hardships and witnessed astounding sights. With great perseverance, they worked their way into an unexplored West. When they returned two years later, they had long since been given up for dead.

The number one New York Times best seller by Pulitzer Prize-winning historian David McCullough rediscovers an important chapter in the American story that's "as resonant today as ever" (The Wall Street Journal) - the settling of the Northwest Territory by courageous pioneers who overcame incredible hardships to build a community based on ideals that would define our country.

More than 200 million years ago, geological forces split apart the continents. Isolated from each other, the two halves of the world developed radically different suites of plants and animals. When Christopher Columbus set foot in the Americas, he ended that separation at a stroke. Driven by the economic goal of establishing trade with China, he accidentally set off an ecological convulsion as European vessels carried thousands of species to new homes across the oceans.

From the perilous ocean crossing to the shared bounty of the first Thanksgiving, the Pilgrim settlement of New England has become enshrined as our most sacred national myth. Yet, as best-selling author Nathaniel Philbrick reveals in his spellbinding new book, the true story of the Pilgrims is much more than the well-known tale of piety and sacrifice; it is a 55-year epic that is at once tragic, heroic, exhilarating, and profound.

Thoreau's classic account of the solitary life, describing his attempts to simplify his life and sort out his priorities by living alone in a cabin beside Walden Pond for nearly two years, is one of the most influential books ever written. The bible of the environmental movement, Walden vividly portrays Thoreau's reverence for nature, and his understanding of the idea that nature is made up of crucially interrelated parts.

Millions of fans of Little House on the Prairie believe they know Laura Ingalls - the pioneer girl who survived blizzards and near-starvation on the Great Plains, and the woman who wrote the famous autobiographical books. But the true story of her life has never been fully told. Now, drawing on unpublished manuscripts, letters, diaries, and land and financial records, Caroline Fraser masterfully fills in the gaps in Wilder's biography.

Clara Barton was one of those diminutive New England women of the 19th century who was determined to make the world a better place. What Susan B. Anthony was to women's suffrage and Harriet Beecher Stowe was to the cause of abolition, Clara Barton was to the humanitarian impulse of the American people to help the unfortunate victims of war and disaster.

In the early spring of 1845, Henry David Thoreau built and lived in a cabin near the shore of Walden Pond in rural Massachusetts. For the next two years, he enacted his own Transcendentalist experiment, living a simple life based on self-reliance, individualism, and harmony with nature. The journal he kept at that time evolved into his masterwork, Walden, an eloquent expression of a uniquely American philosophy.

"I am hopelessly and forever a mountaineer," John Muir wrote. "Civilization and fever and all the morbidness that has been hooted at me has not dimmed my glacial eye, and I care to live only to entice people to look at Nature's loveliness. My own special self is nothing". In Donald Worster's magisterial biography, John Muir's "special self" is fully explored as is his extraordinary ability, then and now, to get others to see the sacred beauty of the natural world.

I hate every wave of the ocean', the seasick Charles Darwin wrote to his family during his five-year voyage on the H.M.S. Beagle. It was this world-wide journey, however, that launched the scientists career.

This essay by Thoreau first published in 1849, argues that individuals should not permit governments to overrule their consciences. It goes on to say that individuals have a duty to avoid allowing the government to make them the agents of injustice. The quote: "That government is best which governs least," sometimes attributed to Thomas Jefferson or Thomas Paine, actually was first found in this essay. Thoreaus' thoughts were motivated by his disgust with slavery and the Mexican-American War but they are still relevant and resonate today.

The legendary annihilation in 1883 of the volcano-island of Krakatoa - the name has since become a byword for a cataclysmic disaster - was followed by an immense tsunami that killed nearly 40,000 people. Beyond the purely physical horrors of an event that has only very recently been properly understood, the eruption changed the world in more ways than could possibly be imagined. Dust swirled round die planet for years, causing temperatures to plummet and sunsets to turn vivid with lurid and unsettling displays of light.

Call it "Zen and the Art of Farming" or a "Little Green Book", Masanobu Fukuoka's manifesto about farming, eating, and the limits of human knowledge presents a radical challenge to the global systems we rely on for our food. At the same time, it is a spiritual memoir of a man whose innovative system of cultivating the earth reflects a deep faith in the wholeness and balance of the natural world. As Wendell Berry writes in his preface, the book "is valuable to us because it is at once practical and philosophical."

When gold was discovered at Sutter's Mill on the American River, it completely transformed the territory of California. Hundreds of thousands of people sped to California by any means possible, and small cities sprung up to service their needs as they sought the precious metal. By 1850, California had become a state; it had also become a symbol of where the nation was going.

In the years 1804, 1805, and 1806, two men commanded an expedition which explored the wilderness that stretched from the mouth of the Missouri River to where the Columbia enters the Pacific, and dedicated to civilization a new empire. Their names were Meriwether Lewis and William Clark. This book relates that adventure from it’s inception through its completion as well as the effect the expedition had upon the history of the United States.