Book excerpt: It's the battle where the world turned upside down and Team Time Machine is on the scene! The squad travels back to 1781 to learn more about the siege of Yorktown, the final major military conflict of the American Revolution. Young readers will be fascinated by the kid's-eye view of these pivotal events, in a topic that's integral to the elementary social studies curriculum. Interesting fact boxes, colorful photographs, and bright artwork pull readers into the stories behind this important historical event.