Sir Cumference and the Sword in the Cone

A Math Adventure

By: Cindy Neuschwander / Illustrated by: Wayne Geehan

Five knights compete for the honor of heir.

King Arthur has hidden his sword, Edgecalibur and issued a challenge to all the knights. The first knight to find the sword will be the next king. Can Sir Cumference and Lady Di point Radius's best friend, Vertex in the right direction? Will Vertex's sharp thinking give him the edge?

Join Sir Cumference, Lady Di of Ameter, and their son, Radius, as they race to help Vertex find the sword and discover all the secrets of cubes, pyramids, cylinders, and cones.