King Arthur was a good ruler, but now he needs a good ruler as the neighboring kingdom threatens war. When the king's strongest and bravest knights cause more problems, Sir Cumference, his wife Lady Di of Ameter, and their son Radius come to the rescue. With the help of the carpenter, Geo of Metry, this team designs the perfect table to discuss the perfect plan for peace.
In this wonderfully illustrated series, go on math adventures with Sir Cumference, Lady Di of Ameter, and their son Radius. Each book presents a mathematical concept in such a way that it allows students to fully comprehend "how" and "why" the characters solve their unique problems.