Henry David Thoreaus Journal was his lifes work: the daily practice of writing that accompanied his daily walks, the workshop where he developed his books and essays, and a project in its own rightone of the most intensive explorations ever made of the everyday environment, the revolving seasons, and the changing self. It is a treasure trove of some of the finest prose in English and, for those acquainted with it, its prismatic pages exercise a hypnotic fascination. Yet at roughly seven thousand pages, or two million words, it remains Thoreaus least-known work. This reader’s edition, the largest one-volume edition of Thoreau’s Journal ever published, is the first to capture the scope, rhythms, and variety of the work as a whole. Ranging freely over the world at large, the Journal is no less devoted to the life within. As Thoreau says, “It is in vain to write on the seasons unless you have the seasons in you.”