"Use your reading superpowers to learn all about one of the world's favorite animals, the elephant. Children will love to find out about a young volunteer's time with the elephants in India and Africa, and the things he learns about these much-loved animals."

The creator of the popular webcomic "xkcd" uses line drawings and just ten hundred common words to provide simple explanations for how things work, including microwaves, bridges, tectonic plates, the solar system, the periodic table, helicopters, and other essential concepts.