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Sir Cumference and the Sword in the Cone
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Sir Cumference and the Sword in the Cone

About the Book

A funny and pun-filled retelling of “The Sword and Stone” that introduces readers to mathematical angles.

King Arthur has hidden his sword, Edgecalibur and issued a challenge to 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, in this new adventure where they race to help Vertex find the sword and discover the secrets of cubes, pyramids, cylinders, and cones.
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Sir Cumference and the Sword in the Cone

One fine morning, Sir Cumference, Lady Di of Ameter, and their son, Radius, sat eating breakfast in King Arthur’s castle.
            Suddenly, the door flew open and a young knight ran into the room. It was Vertex, Radius’s best friend. “I’ve found out why King Arthur called us all here!” Vertex exclaimed.
            “The King wants to choose an heir,” Vertex explained. “Five knights are competing for the honor. I’m one of them.”
            “You would make a fine king,” Sir Cumference said.
            “That’s right,” agreed Radius. “You helped the King make peace with the Euclideans last year.”
            “Yes, but now I have to solve the puzzle on this parchment,” Vertex said. “The King has hidden his sword, Edgecalibur. The knight who finds it will be the next king.”

Sir Cumference Series

Sir Cumference Speaks Volumes
Sir Cumference and the 100 PerCent Goose Chase
Sir Cumference Gets Decima's Point
Sir Cumference and the Fracton Faire
Sir Cumference and the Roundabout Battle
Sir Cumference Classroom Activities
Sir Cumference and the Off-the-Charts Dessert
Sir Cumference and the Viking's Map
Sir Cumference and All the King's Tens
Sir Cumference and the Isle of Immeter
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About the Author

Cindy Neuschwander
Cindy Neuschwander is a native Californian born in San Diego. She received a BA in international studies from Willamette University and an MA in education from Stanford University. She has been teaching since 1975, both at the high school and elementary levels. As a mathematics education specialist, Cindy sought ways to make math fun, interesting, and comprehensible to her students. In 1992, while living in England, Cindy began working on her first book with this goal in mind. Sir Cumference and the First Round Table took five years to reach publication, but it remains a very popular book for its presentation of math concepts as well as for its amusing and exciting story. More by Cindy Neuschwander
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About the Author

Wayne Geehan
Wayne Geehan, a graduate of the Art Institute of Boston, has been illustrating books, board games, and jigsaw puzzles for over 20 years. He is the illustrator of Multiplying Menace and Cut Down to Size at High Noon, as well as the Sir Cumference series. When he isn't painting in his Massachusetts studio, he enjoys being with his family, reading, and researching his family's genealogy. More by Wayne Geehan
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