Jim Pipe studied Ancient & Modern History at Oxford University, then spent ten years in publishing before becoming a full-time writer. He has written numerous non-fiction books for children, many on historical subjects. He lives in Dublin, Ireland, with his lovely wife Melissa and his twin sons.
I don't think this would be a good choice for learning medieval history even if I were a kid who didn't want to learn anything. It's not entirely the author's fault - the pictures are all slightly blurry and the colors seem off. Maybe "hunting the assassin" is more fun if you are not a farsighted old lady.