The World's Greatest Spy. The Storybook Illustrated Guide to the Nervous System

Some stories have a hero that saves the day; some others have a very clever detective that resolves complex cases. In this story, you'll join not only a clever character that knows how to save your day, but the world's greatest spy. A spy that perceives if you feel scared or happy about something, that knows when you're lying and has a complete army under his command. Join the world's greatest spy to a journey in your nervous system!