There is little need to review these two books because they are so well read and revered in scientific and historical communitys but this collection was a great find.
Both books are compiled together in chronological order with a wonderful new little prologue.
The front cover artwork is probably the most beautiful and up to date I've seen of any Darwin reprints.
The 'voyage of the beagles'was Darwins first book and within it is the first few threads of Darwins thinking on evoloution.
Its easy to read but never too simple to enjoy, basically its a diary of Darwins exploits and travels. Its wonderful to get into the mindset of a scientist who was destined for greater things. The descriptions of the landscapes and animals are beautifully portrayed and let you have a real feel for the culture and bizare discoverys, the crew of the beagle had stumbled upon.
There is little to say about the origin of species that you won't have heard, infact I doubt you need to read a review of this book to appreciate how good it is.
Our entire modern biological understanding has only grown since this book, although not a complete theory at the time, its hard not to be compelled by the writtings even now.
I loved the double edition of these books and it was also very cheap to buy.
I urge you to read these books and understand just how influential they have been to society in general.