On Stranger Tides is a monthly deal, I believe, so doesn't necessarily need to be bought today. It's been on offer before, and so far I've resisted, but I must admit I am curious as to how this was turned into the fourth Pirates of the Caribbean movie. Not that I've seen the film, either. I have played the lego version in video game form, however.
Shades of Milk and Honey by Mary Robinette Kowal, however, is a Daily Deal, at the same price.
Amazon UK link.