Countless thousands of streams flow to the sea, but every one a bit different from the other; each wending its way to join other streams and form mighty rivers. They roll through valleys and mile-deep gorges, through tropical forests and snowy wastelands. 

In this book, you will explore 5 of the world's mightiest---the Nile, the Amazon, the Yangtze, the Volga, and the Mississippi. 

It is a thrilling story of changes and shifts, of the people who live along their banks, of the animals that depend upon them, and the men who struggle upon their waters.