This book covers more than just whales - it shows all sorts of marine mammals, including seals and walruses, sea lions and dolphins, porpoises and manatees.
Incredible photographs hold your child's interest, and the facts and details give your child an excellent understanding. This book also covers whaling, and includes a photograph of a whale that has been killed by whalers. It shows seal hunters, also.
There is a good section in this book that shows the problems associated with fishing and pollution. It talks about oceanographers and marine biologists, how they track and identify ocean animals, and how humans are helping and studying these species.