Books in Top Secret! series

Amazing phenomena happen on Earth every day. Young readers will learn answers to some of nature's greatest questions, including why the sun sets, where rain comes from, and how seeds sprout. How do these everyday phenomena, which have a huge impact on the natural world, happen? Bright photographs and age-appropriate language help bolster comprehension as readers discover the answers to questions people have asked for thousands of years. Features include: Supports the Next Generation Science Standards by introducing readers to concepts such as weather and climate and space systems. Graphic organizers present readers with information supported by the narratives. Glossaries aid young readers in strengthening their developing vocabulary.

Have you seen an alien? Do you know what they look like? Many people have claimed that they have spotted an alien or that they have been abducted by one. In this fascinating book, a mysterious figure called the Mystery Master sets you the challenge of iinvestigating all the myths and sightings surrounding aliens and encourages you to analyse the information that you have gathered. Once you have read the information in this book, you can figure out for yourselves: Have aliens visited Earth?

Do you think time travel will ever be possible? Will all the books and films that show time travel become a reality? How does the science work? In this fascinating book, a mysterious figure called the Mystery Master sets you the challenge of investigating all the scientific theories surrounding time travel and encourages you to analyse the information that you have gathered. Once you have read the information in this book, you can figure out for yourselves: Is time travel possible?

Amazing phenomena happen on Earth every day. Young readers will learn answers to some of nature's greatest questions, including why the sun sets, where rain comes from, and how seeds sprout. How do these everyday phenomena, which have a huge impact on the natural world, happen? Bright photographs and age-appropriate language help bolster comprehension as readers discover the answers to questions people have asked for thousands of years. Features include: Supports the Next Generation Science Standards by introducing readers to concepts such as weather and climate and space systems. Graphic organizers present readers with information supported by the narratives. Glossaries aid young readers in strengthening their developing vocabulary.

In some parts of the world, Earth's four seasons are very different. Some places don't experience much of a change in seasons at all. This book explains the science behind the changing of the seasons. The features of each season are explained in the context of the Earth's position relative to the sun. Age-appropriate text, full-color photographs, and infographics demystify this complex topic. Readers will learn about our yearly journey around the sun.

"Rainy days might make some people sad. But while you might not want to get caught out in a downpour, Earth needs rain! Rain is responsible for keeping our plants healthy, giving us drinking water, and giving us a way to cool off when it's hot. In this book, readers will learn each step of the water cycle, one of Earth's most important processes, and where rain fits in. Photographs and a simple diagram depict the water cycle in action. Reading this book will give readers a new appreciation of rainy days"--

"Rainy days might make some people sad. But while you might not want to get caught out in a downpour, Earth needs rain! Rain is responsible for keeping our plants healthy, giving us drinking water, and giving us a way to cool off when it's hot. In this book, readers will learn each step of the water cycle, one of Earth's most important processes, and where rain fits in. Photographs and a simple diagram depict the water cycle in action. Reading this book will give readers a new appreciation of rainy days"--

The Yeti, or Abominable Snowman, is a famous beast who has prompted many expeditions and searches to find him. In this fascinating book, a mysterious figure called the Mystery Master sets you the challenge of investigating all the myths and sightings surrounding the legendary Yeti and encourages you to analyse the information that you have gathered. Once you have read the information in this book, you can figure out for yourselves: Does the Yeti exist?

When winter hits, many people in colder climates spend most of their time indoors. But what do wild animals do? Some animals spend winters hibernating. Beginning readers will learn what hibernation is, why some animals hibernate and others don't, and how hibernating animals prepare for their long sleep. Full-color photographs grab readers' attention and allow them to draw connections to the narrative. Readers will love learning about this mysterious, restful time in some animals' lives.