Radius, son of Sir Cumference, embarks on a quest to find the magic number known as pi in order to restore his father--who has been turned into a dragon--to his original shape.
Rolie Polie Olie, a round robot living on a planet where everything is round, enjoys a busy day with his family and then is too wired to go to bed at night.
Ranging from ancient times to twentieth-century theories of time and space, looks at how exploring the circle has lead to increased knowledge about the physical universe.
The audience for this book includes just about anyone who has any curiosity at all about how mathematics helps in explaining the world."--Paul J. Nahin, author of An Imaginary Tale "I learned a lot from this book.