I have this book: North Downs Way (National Trail Guide) [Paperback].
I am so sad that I am going to photocopy the bit from the Denbie Estate to the finish if I don't get time to run it, so I don't have to carry the book.
Don't pick up on my paranoia, you'll be fine, but the book is interesting, and it gives historical details about the route which I found interesting.
On the whole the weather has been very kind to us runners. I have some new trail shoes, and a new waterproof gore running jacket, as well as a new back pack which should be arriving this week. Have to get out there and break them in.