From the wheel to trampolines, these crazy inventions have changed our world. Learn about the ideas behind some of the most incredible inventions. This engaging hi-lo book draws in 4th and 5th grade readers with wild content while a 1st to 2nd grade reading level makes the information accessible. It's a roaring good time!

Welcome, Agent 359. This file is full of top-secret information about black holes. Learn the basics of how black holes form, their different sizes, and how they were found. Then, discover what scientists are learning about them now. What will you do with our new knowledge? Good luck and remember these are top secret space files!

Welcome, Agent 359. This file is full of top-secret information about asteroids and comets. Learn about what is inside these large space lumps, where they come from, and different asteroids and comets throughout history. Then, discover what we are learning about them now. What will you do with your new knowledge? Good luck and remember these are top secret space files!

The people of the past lived in strange ways, and some died under equally odd circumstances. Learn about the bizarre mistakes that became moral for four unlucky individuals. This engaging hi-lo book draws in 4th and 5th grade readers with wild content while a 1st to 2nd grade reading level makes the information accessible. It's a roaring good time!

Dogs may be our best friends, but sometimes animals can be our worst enemies. Learn about the bizarre ways four people were beaten by beasts. This engaging hi-lo book draws in 4th and 5th grade readers with wild content while a 1st to 2nd grade reading level makes the information accessible. It's a roaring good time!

For thousands of years, people have wished they could fly. Thanks to a few trailblazers, people soar through the air every day. Fun illustrations pair with bright photos to help readers learn all about our greatest adventures.

In the past, traveling was difficult. Some places weren't even on maps! But many trailblazers have found ways to explore our world. Fun illustrations pair with bright photos to help readers learn all about our greatest adventures.

Earth is a large planet with many hidden things. We make new discoveries all the time. The world is full of mysteries, but some things can be explained with science. Learn about the scientific method and how it can help you discover the truth. Get ready to blow up some totally-not-true Earth myths.

Take a trip to South Africa! Start in the city of Cape Town, where you'll find Table Mountain and thousands of African penguins on a beach. Then, head to the Motlatse Canyon with its many waterfalls. And don't forget to watch a game of Jukskei! Learn all about South Africa as you explore the country through this fun and engaging book.

Take a trip to Colombia! Start in the city of Bogotá, where you'll find many colorful buildings. Then, go dance and wear costumes at the Barranquilla Carnival. And don't forget to visit the painted tombs or drink some coffee! Learn all about Colombia as you explore the country through this fun and engaging book.