Before he was the President of the United States, George Washington was a spy! It's true.and he wasn't the only one! During the American Revolution, founding fathers like Alexander Hamilton and Benjamin Franklin sent secret messages rolled up in quill pens, used invisible ink, and wrote in secret codes to keep important information from getting into British hands. Without spies, Americans might still speak with British accents: find out how and why it happened in this book that includes a special extend-the-learning section with activities about the science behind invisible ink, how to make a secret code, and more! Recommended for ages 6 to 8 years.