The Dakota cipher
Subtitle: an Ethan Gage adventure
By: William Dietrich
Publisher: Harper
Published: 2010
Place of publication: New York, N.Y
Language: eng
Number of pages: 464
ISBN-13: 9780061568084
Copyright date: 2009
Description: "With President Thomas Jefferson's blessings, Ethan and Magnus embark upon an expedition into the western wilderness--keeping their eyes open for woolly mammoths.  But another prize secretly impels them : the mythical hammer of the Norse god Thor, allegedly carried to North America more than a century before Columbus.   Across a landscape no white man has ever traversed, Gage's skills will be tested as never before--as he bravesunimaginable peril en route to the most incredible discovery of all time."  [back cover]