Traveling Across Borneo On Foot.

"The New York Times Magazine" called Galdikas the "third angel" of Louis Leakey, who also taught Jane Goodall and DIan Fossey. Galdikas has been studying orangutans in Indonesia since 1971, when virtually nothing was known about the animals in the wild. Since then, there have been articles about her, and her research in "National Geographic" and other magazines. She has just written a new book about her work, "Reflections of Eden: My Years with the Orangutans of Borneo."

Travel writer Colin Thubron. His new book about his travels In the heart of Siberia Is "In Siberia" (HarperCollins). It's the third In his trilogy on the Russian landmass which Includes "Where Nights Are Longest" and "The Lost Heart of Asia." Thubron has also written books on the Middle East, China, and Central Asia.

Paul Theroux ("Thuh-RUE") is no ordinary travel writer: his books are about exotic voyages, some by train, and others by foot. His work includes "The Great Railway Bazaar," "The Old Patagonian Express," and "The Kingdom By The Sea." He's also a novelist, perhaps best known for "The Mosquito Coast," which became a film starring Harrison Ford. In his latest book, " The Happy Isles of Oceania," Theroux explores the far-off Pacific Islands, traveling from island to island in a one-man, collapsible kayak.