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 all about Thomas Edison, one of the most important figures in American history, in this colourful, inviting, and entertaining biography. This carefully levelled reader is written in an easy-to-grasp style to encourage the inventors of tomorrow! Level 3: Becoming independentBest suited to kids who are ready for complex sentences and more challenging vocabulary, but still draw on occasional support from adults. They are ideal for readers of Purple and Gold books.