The five Great Lakes must be seen to be believed. When astronauts took this photo of them, we finally got an idea of their majesty. They flow following gravity toward the Atlantic where the freshwater flows into salt in the St. Lawrence estuary.

The Dynamic Great Lakes is not about a single lake but about a system and its connecting waters.

It is about the fish and other biota in these lakes.

It is about what we might do to preserve these lakes, but the first step is to learn about them. Some have called the book empowering. It is available from bn.com, Amazon.com. Canadians may order from Chapters.indigo.com as well as several on line stores and from the publisher at 1-301-695-1707.

The book has been critically acclaimed.