This is the 2nd volume of More letters of Charles Darwin and contains further extended studies of Darwin and his work , as well as brief notes of his biography.
On the Origin of Species
The Autobiography of Charles Darwin
The Expression of the Emotions in Man and Animals
Journal of Researches into the Natural History and Geology of the Countries visited during the voyage round the world of H.M.S. Beagle
More Letters of Charles Darwin — Volume 1