A Week on the Concord and Merrimack Rivers and Walden, the only works Thoreau conceived and brought to conclusion as books, bear a distinctively important relation to each other and to his Journal, the document whose twenty-four-year composition encompasses their development. In a brilliant new book, H. Daniel Peck shows how these three works engage one another dialectically and how all of them participate in a larger project of imagination. "Morning work," a phrase from Walden, is the name Peck gives to this larger project. by it he means the work done by memory and perception as they act to shape Thoreau's emerging vision of a harmonious universe. Peck argues that the changing balance of memory and perception in the three works defines the unique literary character of each of them. He offers a major reevaluation of Walden, which he sees neither as the epitome of Thoreau's career (the traditional view) nor as an anomaly (the recent, revisionary view). Rather, he sees Walden as a pivotal work, reflecting the issues of loss and remembrance that earlier had found prominent expression in A Week and prefiguring the late Journal's vision of natural order. Focusing on the two-million-word Journal, Peck provides the first critical analysis that defines the essential forces and the imaginative coherence in its vast discursiveness. The consideration of memory and perception in Thoreau also leads peck to the issue of the writer's modernity, and he explores the ways in which Thoreau anticipates twentieth-century thought, especially in the works of such great objectivist philosophers as William James and Alfred North Whitehead.

Henri David Thoreau was an American writer, philosopher, publicist, naturalist, and poet. He prominently represented American transcendentalism throughout the mid-1800s. Thoreau’s love and observations of nature played a significant role in his writings, often forming the basis for critiques on modern society. As a naturalist, he advocated for the conservation of nature. Thoreau encouraged individual, passive, non-violent as a means of resistance to public evils. He personally supported the abolitionist movement and, as much as possible, took an active interest in the fate of fugitive slaves who were sought by the police. His essay "On the Duty of Civil Disobedience" (1849) influenced Leo Tolstoy, Gandhi, and Martin Luther King. Thoreau’s key ideas and observations are contained in these collected works.

In the hot summer of 2004, David Leff floated away from the routine of daily life just as Henry David Thoreau and his brother had done in their own small boat in 1839. Fortified with Thoreau’s observations as revealed in A Week on the Concord and Merrimack Rivers, Leff brought his own concept of mindful deep travel to these same New England waterways. His first-person narrative uses his ecological way of looking, of going deep rather than far, to show that our outward journeys are inseparable from our inward ones. How we see depends on where we are in our lives and with whom we travel. Leff chose his companions wisely. In consecutive journeys his neighbor and friend Alan, a veteran city planner; his son Josh, an energetic eleven-year-old; and his sweetheart Pamela, a compassionate professional caregiver, added their perspectives to Leff’s own experiences as a government official in natural resources policy. Not so much sight seeing as sight seeking, together they explored a geography of the imagination as well as the rich natural and human histories of the rivers and their communities. The heightened awareness of deep travel demands that we immerse ourselves fully in places and realize that they exist in time as well as space. Its mindfulness enriches the experience and makes the voyager worthy of the journey. Leff’s intriguing, contemplative deep travel along these historic rivers presents a methodology for exploration that will enrich any trip.