Mary Hays Weik (1898–1979) was an American children's book author and activist for world government.
[1][2] Weik was born on December 18, 1898, in Greencastle, Indiana, daughter of the biographer Jesse W.
[3] She was the author of The Jazz Man, which received a Newbery Honor in 1967.
[4] Her daughter was the author and illustrator Ann Grifalconi.
[5] She wrote booklets for the American Federation of World Citizens and the Committee to End Radiological Hazards.