National Geographic Primary Readers is a high-interest series of beginning reading books that have been developed in consultation with education experts. The books pair magnificent National Geographic photographs with lively text by skilled children's book authors across four reading levels. Find out the inspiring story of female pilot Amelia Earhart, and the mystery behind her disappearance, in this fascinating biography. Level 2: Becoming fluentThese books are a good match for kids who are developing reading stamina and enjoy a longer book. They are ideal for readers of Green, Orange and Turquoise books.