born Dec. 8, 1859, Worcester, Mass., U.S.
died June 13, 1922, Bedford Hills, N.Y.
U.S. publisher.
Hooper left school at age 16 and became involved in bookselling. With the collaboration of Encyclopædia Britannica 's ninth edition (1875–89). In 1901 he and Walter Jackson purchased Britannica outright; it was sold in 1920. He planned and published the 10th edition (1902–03), of which his brother {{link=Hooper, Franklin Henry">Franklin Henry Hooper was an editor; the 11th edition (1910–11), famed for its rich, leisurely prose and for being wholly new in concept; and the 12th edition (1922).