This nonfiction reader shines a light on Thomas Edison and his greatest invention-the lightbulb! This nonfiction reader shines a light on Thomas Edison and his greatest invention-the lightbulb! As a curious child who was always asking questions, it's no wonder Thomas Edison grew up to become a famous, prolific inventor. This easy-to-read nonfiction story follows Edison from his time in school to his career as a full-time inventor. While it focuses on his groundbreaking creation of the lightbulb, this illuminating account also details other important innovations of his, like the phonograph and the microphone. Edison's discoveries will fascinate and inspire all curious young minds!.