The Last Pendragon, by the awesome and always entertaining Holly Chism is free on amazon and this weekend. It was a steal at full price, so go get a copy.
In other news, the sequel, Pendragon Resurgent will be out next week. I was privileged to be a beta reader, and it is every bit as good as the original. Maybe even a little better. Which is saying a lot, considering how much I liked the original.