William James Herbert Hayens (1861 – January 22, 1944) was an English novelist and editor.
He edited anthologies and was an author of many books written for boys and young adults.
Several of his books focused on themes of war and adventure and was compared in style to George Alfred Henty.
His book, A Vanished Nation is an account of the Paraguayan War; A Captain of the Irregulars chronicled the war between Chile and Peru; and Red, White and Green told a story about the Hungarian Revolution of 1848.
However, the reviewer criticised Hayens for paying more attention to the subject matter which detracted from the literary cohesion of his novels.