In 1939, the world was in turmoil -- Europe had declared war, and in the years to come, countries like Japan and the United States would also join the global conflict. In collaboration with London's Imperial War Museum, readers can take a trip back in time and learn about the factors that lead up to Pearl Harbor, the Battle of Britain, the D-Day invasion and the advent of the Atomic Bomb. A war history book for kids that will take them through the events of World War II and teaches them about the main battles, key players, technological advances and everyday people caught in the middle of WWII.