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. Learn how animals and plants change and adapt to day and night in this photographic non-fiction book. 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.