An English import brings a very substantial biography of Darwin to young Americans. The author is well known in British scientific circles and as a writer she shows in her work the kind of exactitude that demands more than a surface reading and goes beyond the scope of personality and vital statistics. It is a study creating a full awareness of the meaning of Darwin's work for mankind. Through the descriptions of his youth, education, the voyage on the Beagle and the compilation of his work that brought him fame at home, there are clear and extensive explanations of theories as they evolved in Darwin's methodical mind. Too, there is the impact they had on society and the exciting clash of ideas- that finds healthy renewal in the minds of young people who are introduced to it through such books as this.