The Librarian who measured the earth

This book describes Eratosthenes' life and inventions and includes color illustrations. No matter how many questions he asked, Eratosthenes never felt he knew everything. His questions finally led him to invent a way to measure the earth. Lasky pens this colorfully illustrated biography of the Greek philosopher and scientist Eratosthenes, who compiled the first geography book and accurately measured the globe's circumference.