The I'm Curious About picture book series teaches young readers about the world's coolest historical figures, discoveries, and events.Nikola Tesla is considered the father of physics and one of the most important inventors of the twentieth century. While he's not as widely known as Thomas Edison, Tesla also made important discoveries about electricity. Learn all about this eccentric man from Croatia who gave us the x-ray, radio, the electric motor, and all sorts of other important inventions.