Grant Allen’s "Charles Darwin" is not an ordinary biography. It is a book about the life of one of the most significant and important people of the 19th century. It depicts the personal development of Charles Darwin – from early age to adulthood. It is a book about Darwin’s theories, discoveries and his most significant works, which remain fundamental today, in our current understanding of the world.Grant Allen was a Canadian writer who lived in the period 1848 – 1899. His writing career began around 1876 when he published a series of essays on science. His first books, "Physiological Aesthetics" and "Flowers and Their Pedigrees" took up this subject as well. Grant Allen was also a pioneer in science fiction. He wrote about thirty science fiction novels in the period 1884-1899. In his later works, Allen also took up some revolutionary theories for the time regarding marriage. "The Woman Who Did" which depicts the life of an independent woman who takes care of her child on her own became a bestseller.