100%: The Story Of A Patriot is a novel by Upton Sinclair, published in 1920.

The story follows the life of Peter Gudge, a poor and uneducated man who is radicalized by the social injustices he experiences in his daily life. Gudge becomes involved in the Socialist movement and eventually joins the Industrial Workers of the World (IWW), a radical labor union that advocated for the overthrow of the capitalist system.

"100%: The Story Of A Patriot" is a powerful critique of American society and politics, and remains a classic work of American literature.

Upton Beall Sinclair Jr. (September 20, 1878 – November 25, 1968) was an American writer, muckraker, political activist and the 1934 Democratic Party nominee for governor of California who wrote nearly 100 books and other works in several genres. Sinclair's work was well known and popular in the first half of the 20th century, and he won the Pulitzer Prize for Fiction in 1943.