King Arthur has issued a challenge. The first knight to find the sword, Edgecalibur, will be the next king. Sir Cumference, Lady Di of Ameter, and Radius help their friend, Vertex, find the sword.

 

This book features in the following series: Maths Adventures, Sir Cumference .

There are 32 pages in this book. This book was published 2010 by Charlesbridge Publishing, U. S. .