Reuters Pictures
An undated handout shows Thad Carhart, author of the book "Across the Endless River. " Carhart found the real-life story of Jean-Baptiste Charbonneau so riveting and improbable that he wrote a novel about it. "Across the Endless River," is set in the vastly different worlds Charbonneau inhabited -- the rough and ready U.S. frontier of the early 19th century and an aristocratic Europe recovering from Napoleon's wars. To match Reuters Life! BOOKS-AUTHOR/CARHART.