DEREK GRZELEWSKI is the author of The Trout Diaries, The Trout Bohemia and The Trout Dreams. He is also a regular contributor to high-end magazines, including New Zealand Geographic, Australian Geographic, Smithsonian, Flylife and Fly Fisherman. A professional fly-fishing guide and internationally qualified casting instructor, he divides his time between New Zealand and Colorado. www.DerekGrzelewski.com