Very well priced single volume collection of `Voyage of the HMS Beagle' (1845), `The Origin of Species' (1859), `The Descent of Man' (1871) and The Expression of Emotions in Man and Animals' (1872).
A Harvard professor for four decades, Edward O. Wilson has written twenty books and received numerous awards, including two Pulitzer Prizes and the 1976 National Medal of Science.
...will bring the wonders of Darwin to a wide audience. [Darwin] was not only great in his time, but if anything he is even greater today. John Tyler Bonner, The Times Literary Supplement "Anyone who wishes to start the new year with a real intellectual feast will buy the four 'great books' of Darwin, published in one volume by W.W. Norton." A.N. Wilson, The Daily Telegraph