I've just finished reading Irving Stone's book,
The Origin. It was a very good read, I feel almost as though I actually know Mr. Darwin. The thing that surprised me the most, I guess, is that he was very ill for much of his life, apparently due to his anxiety over the theological implications of his theory of natural selection. Either that, or he was just a hypochondriac!
And then this morning I came across a copy of On The Origin of Species, so I'll be reading that soon. I've never read the whole thing, I'm looking forward to it, now, having read the Irving Stone bio of him.
I've got a Jack Reacher novel to finish first, though.