My pleasure, carandol. I only found it when following up a blog post. I finished the first book (The Stone Arrow) yesterday, in fact it kept me up 'til after 1 o'clock. It's pretty neat - vivid, like a movie in your head. It reminded me of when I was a kid and used to read under the bedclothes with a torch so my parents wouldn't know I was still awake. You've just got to know what happens!
I'm going to try his new book next. Are there any other authors doing this? 85p certainly beats the price of Sony's offerings.