Charles Darwin
Autobiography of Charles Darwin
Descent of Man and Selection in Relation to Sex, Part 1
Descent of Man and Selection in Relation to Sex, Part 2
Descent of Man and Selection in Relation to Sex, Part 3
Expression of the Emotions in Man and Animals
Formation of Vegetable Moulds through the Action of Worms with Observations on their Habits
Movement and Habits of Climbing Plants
Ontstaan der Soorten
Origin of Species by Means of Natural Selection
Origin Of Species by Means of Natural Selection (version 2)
Voyage of the Beagle