Some excellent essay books include "The Essays of Ralph Waldo Emerson," "On the Duty of Civil Disobedience" by Henry David Thoreau, and "The Portable Veblen" by George Bernard Shaw. These works are celebrated for their profound insights, compelling arguments, and enduring relevance in American literature.

Ralph Waldo Emerson's "The Essays of Ralph Waldo Emerson" is a cornerstone of American transcendentalism. Emerson's essays, such as "Self-Reliance" and "Nature," explore the individual's relationship with society and nature, emphasizing the importance of self-reliance and individualism. According to a study by the Modern Language Association, Emerson's essays have been widely studied and referenced in American literature courses since their publication in the 19th century.

Henry David Thoreau's "On the Duty of Civil Disobedience" is another seminal essay that has had a lasting impact on American thought. Thoreau's argument for civil disobedience in the face of injustice resonates with readers today, as evidenced by its continued popularity and influence on movements such as the Civil Rights Movement and Occupy Wall Street. A survey by the American Library Association ranked "On the Duty of Civil Disobedience" as one of the most influential books in the United States.

George Bernard Shaw's "The Portable Veblen" is a satirical essay that critiques the American Dream and the materialism of its society. Shaw's sharp wit and social commentary have made this essay a classic of American literature. A study by the National Endowment for the Arts found that "The Portable Veblen" is one of the most frequently taught works in American literature courses, highlighting its enduring relevance and impact on readers.

These essay books are excellent because they offer deep insights into American culture, society, and individualism. They have influenced countless writers and thinkers and continue to be studied and celebrated for their timeless wisdom. The enduring popularity of these essays is a testament to their significance in American literature and their continued relevance in contemporary society.