There's a kids' picture book about Eratosthenes called The Librarian who Measured the Earth: http://www.amazon.com/gp/product/0316515264 http://www.amazon.com/

There's a kids' picture book about Eratosthenes called The Librarian who Measured the Earth: http://www.amazon.com/gp/product/0316515264 http://www.amazon.com/gp/product/0316515264