Anyone would be hard-pressed to find a pastime more emblematic of the western spirit than fly-fishing. Liberating, poetic, wild, soothing and inspiring, it pushes the boundaries of the mind. In essays ranging from introspective to ironic, angler authors Chadd VanZanten and Russ Beck distill the purest truths of fly-fishing into essential, often humorous rules of thumb. With kernels like "always tell the truth sometimes" and "all the fish are underwater,"...