Beginner Readers, Chapter Books, Inventions & Inventors, Science & Technology, How Things Work 

Thomas Edison: The Greatest Inventor tells the story of the greatest inventor of the modern age, and how his creations have changed our world.DK Readers is a multi-level learning-to-read program combining DK's highly visual style with appealing stories at five graduated levels. Stunning photographs and engaging, age-appropriate stories are guaranteed to capture a child's interest while developing reading skills and general knowledge. DK Readers allow progression from stories for beginning readers with simple sentences and word repetition through to stories with rich vocabulary and more challenging sentence structure for proficient readers. Written by leading children's authors and compiled in consultation with leading literacy experts. - from Amzon