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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Creators
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Series
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Publisher
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Release date
January 7, 2013 -
Formats
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Kindle Book
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OverDrive Read
- ISBN: 9781607345602
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Languages
- English
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Levels
- ATOS Level: 4.1
- Lexile® Measure: 630
- Interest Level: K-3(LG)
- Text Difficulty: 2-3
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Reviews

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subjects
Languages
- English
Levels
- ATOS Level:4.1
- Lexile® Measure:630
- Interest Level:K-3(LG)
- Text Difficulty:2-3
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