There's a castle for sale in upstate New York.
So, with that in mind, I shall re-recommend both Keeping the Castle (so adorbs!) and I Capture the Castle (which I loved so much that I posted about it three pages in, and then after I'd finished it). Oh, and look, NPR posted an excerpt of it back in 2008.
More about the New York castle up for grabs over at boingboing.