Overhyped. The construct of the river journey is both gimmicky and over-exploited, and his extended rant against Shellenberger and Nordhouse borders on the obsessive. I'm not sure if Gessner thinks of himself as a modern day Twain, but this book feels styled after 19th century American comedies. Enough osprey talk to bore even a dedicated birder. Still probably remains an important book in contemporary environmental philosophy, though.