Books in 50 Things You Didn't Know About series

Across 50 bite-sized chunks of information (and generously illustrated with photos, sketches and infographics), all the presidents are covered - from the first person to take office, George Washington to Barack Obama. Fascinating facts are included on each page: for example, did you know that Franklin D Roosevelt is the longest serving president? The US political system is clearly explained, with the major changes throughout the decades highlighted for easy reference.

In the ancient world, philosopher Archimedes designed new machines for farming. During the Renaissance, artist Leonardo da Vinci sketched his ideas for wondrous flying machines. Scientist James Watt provided ideas that would power the Industrial Revolution, while American inventor Thomas Edison patented more than 1000 inventions that would shape modern life, including the movie camera and the electric light bulb. Today's inventors still explore ideas for new and clever technology, producing miniature machines that we can only see under a microscope. Step inside the world of invention and see where it might take us next...

The human body is complicated and incredible! The many parts of the body form a network of systems that work together to keep you alive and active. Each chapter focuses on a different system: Outer Body, Nervous System, Skeleton and Muscles, Breathing System, Heart and Blood, Digestive System, Urinary System, Growing and Changing. Body maps are included to show how organs and systems all function together. The mechanics of the human body are described in concise and easy-to understand text while infographics and photographs bring the various systems to life. Fact panels provide fascinating snippets of extra information.