For years, people have told strange stories about mysterious objects that move through the sky. These tales say the UFOs might be spaceships. But is there any truth to this belief? Explore this mystery through maps, labeled images, and other infographics along with vibrant text spreads that delve into these stories and the possible explanations behind them. Essential for curious readers, UFOs captivates the imagination through carefully leveled text and striking imagery that inspires early readers to think critically about their world. On-page vocabulary definitions, a table of contents, a glossary with pronunciations, further resources, and an index all enhance comprehension in a nonfiction beginning reader format.