First published in 1912, this is a thoroughly unromanticized, absorbing account of a 2,000-mile journey by steamship deep into the Amazon. The tale, understated and often hilarious, meanders like a great river. Here's a sample: "We were then a thousand miles from the sea, well within South America. But that meeting place of the Amazon and its chief tributary was an expanse of water surprising in its immensity." A classic.  (AMZ10, $18.00)

Tropical Forest