Author:Ernst Haeckel

Books

 * Freedom in Science and Teaching (1879),
 * The evolution of man (1879)
 * The History of Creation (1868), translated by E. Ray Lankester,
 * India and Ceylon (1883)
 * The pedigree of man, and other essays (1883)
 * Kunstformen der Natur ("Art forms of Nature") (1904), (from series published 1899–1904): over 100 detailed, multi-color illustrations of animals and sea creatures.
 * Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876 (1887)
 * Report on the Siphonophoræ collected by H.M.S. Challenger during the years 1873-1876 (1888)
 * Planktonic studies (1893)
 * Monism as Connecting Religion and Science (1895)
 * The last link: our present knowledge of the descent of man (1898)
 * The riddle of the universe at the close of the nineteenth century (1900), translated by Joseph McCabe
 * The wonders of life; a popular study of biological philosophy (1905), translated by Joseph McCabe
 * The pedigree of man: and other essays (1903)
 * Confessions of Faith (1910) external scan
 * Last Words On Evolution A Popular Retrospect And Summary (1905), translated by Joseph McCabe

Articles

 * "On Our Present Knowledge of the Origin of Man" in Annual Report of the Board of Regents of the Smithsonian Institution for 1898, pages 461–480 (1899), translated from the author's edition in German of a discourse delivered at the Fourth International Congress of Zoologists at Cambridge, England, August 26, 1898.
 * The Thirty Theses Of Monism (1904)

Book Reviews

 * "Man and Evolution; The Advance in Scientific Knowledge Since Darwin's Day - Prof. Ernst Haeckel's Recent Books" by Joseph Jacobs, in The New York Times, September 1905

Works about Haeckel

 * Haeckel's contribution to religion by A. S. Mories, 1904
 * Haeckel, his life and work by Wilhelm Bölsche, 1861-1939; (1906) translated by Joseph McCabe,
 * Haeckel: his life, work and companions by Henry Buckingham Witton, 1831-1921 (1909)
 * Haeckel: his life, work and companions by Henry Buckingham Witton, 1831-1921 (1909)