"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]
- ISBN10 0061925748
- ISBN13 9780061925740
- Publish Date 7 April 2009 (first published 24 March 2009)
- Publish Status Temporarily Withdrawn
- Imprint HarperCollins eBooks
- Format eBook
- Pages 448
- Language English