Book excerpt: This amazing part of the northeast Pacific Ocean is home to some of the planet's mightiest and most beloved residents: whales, sea lions, dolphins, orcas, sea otters and wild salmon. Following up the success of their first two books about the Great Bear Rainforest, The Salmon Bears and The Sea Wolves, Ian McAllister and Nicholas Read take readers on an expedition into the wondrous and mysterious underwater world of the Great Bear Sea. Filled with spectacular images of this largely unknown part of the world, the book also explores the uncertain future of the Great Bear Sea in this age of climate change, overfishing, pipelines and oil tankers. Can a rainforest full of rare spirit bears, fishing wolves and great grizzlies survive without a Great Bear Sea to feed and nourish it?