For those folks who enjoy reading about fly fishing, I'd recommend getting a copy of "Stronghold - One Man's Quest to Save the World's Wild Salmon", by Tucker Malarkey. (Try the public library.)
It's very well written, entertaining and informative from cover to cover. It's somewhat a biography of Guido Rahr, who founded the Wild Salmon Center, but is much broader in scope as well. It tells the story of how the WSC came about, as well as how Guido pretty much single-handedly opened up the Kamchatka Peninsula, Sakhalin Island, and the Tugur River in Russia to fly fishing. He worked with celebrities, oligarchs and politicians to achieve this. Guido holds the world record for Taimen caught on a fly – Taimen are a salmonidae that can exceed 100 lbs and who eat chum salmon for breakfast. Guido was also very involved with the fight against the Pebble Mine in Alaska, and helped expand the Marine Stewardship Council to cover the Pacific Ocean. You'll undoubtedly learn more about the ecology of a river, how salmon play a central role in it, and how humans are gradually destroying a critical link in our planet's lifecycle.
