William Henry Bradley (July 10, 1868 - January 25, 1962) was an American Art Nouveau illustrator and artist. Nicknamed the "Dean of American Designers" by The Saturday Evening Post, he was the highest paid American artist of the early 20th century. He set up the Wayside Press, where he served as an illustrator, editor, typographer, designer, and press manager for a periodical aptly named Bradley: His Book. The periodical usually contained compilations of poetry, stories, and sketches, and his work received a warm reception. He had achieved financial success, but the stress of managing so many projects at once began to damage his health, and he collapsed at the age of 28. He recovered quickly, but he was forced to sell the Wayside Press. His primary medium was posters, at the time a developing art form. Poster art was pioneered at the turn of the century by French artists like Jules Ch矇ret and Toulouse-Lautrec, but Bradley is credited with popularizing the two-dimensional poster style in the United States. He was a prolific artist and designer up until his death at age 94.