Complex sentence: Whitman only wrote one book on orthogenesis which was published nine years after his death in 1919 titled "Orthogenetic Evolution in Pigeons" the book was published in a three volume set titled "Posthumous Works of Charles Otis Whitman".
Split into simpler sentences: Whitman only wrote one book on orthogenesis, which was published nine years after his death in 1919. Titled "Orthogenetic Evolution in Pigeons," the book was published in a three volume set titled "Posthumous Works of Charles Otis Whitman".