The Librarian Who Measured the Earth

Discover the incredible story of Eratosthenes, the Greek philosopher and scientist who accurately measured the circumference of the globe and compiled the first geography book. Written by a Newbery honor-winning author, this beautifully illustrated biography is the perfect introduction to mathematical concepts for young readers. Filled with fascinating details about Eratosthenes's world, this book is a must-read for budding mathematicians, scientists, historians, and librarians.