Henry David Thoreau is known for writing several important books, including:
* Walden (1854) - his most famous work, a reflection on simple living and self-sufficiency in nature.
* A Week on the Concord and Merrimack Rivers (1849) - a travelogue based on a trip Thoreau took with his brother John.
* Civil Disobedience (1849) - a powerful essay arguing for individual conscience and resistance to unjust laws.
* The Maine Woods (1864) - a collection of essays about Thoreau's travels in the Maine wilderness.
* Cape Cod (1865) - a collection of essays about Thoreau's travels along the Cape Cod coastline.
He also wrote numerous essays, journals, and poems.