"It is 1858. Charles Darwin struggles to finish On the Origin of Species and give the world his theory of natural selection, while coping with family illness and his own impending loss of faith. Meanwhile, halfway around the world, Alfred Russel Wallace, a brilliant but virtually unknown explorer and Utopian socialist, has come up with the exact same theory. The one person he sends his abstract to is Charles Darwin. Can Darwin claim priority? And what will happen if he doesn't finish his own book in time?"--Page 4 of cover.