Yes, this post is going to be a short one, because really, I think it's all quite self explanatory. For this Wednesday and Thursday, Castles on the Sand is free to download on Amazon.com, Amazon.co.uk, Amazon.de, Amazon.fr, Amazon.es, and Amazon.it. The links in this post are to Amazon.com, as that's where most of my sales originate. The link from the UK store in the righthand sidebar will get you to the UK site.
Everyone enjoy, download, tell your friends!