Clouds are above us nearly every day, but certainly some clouds make us stop and stare. In this fascinating book, readers will discover the many unusual forms clouds can take. They'll learn how and why clouds form, why some look downright creepy, and how they can be clues about coming weather. Amazing photographs of strange cloud phenomena complement main content and help make this text a high-interest way of addressing curricular standards. A concluding quiz reviews and reinforces key concepts.