Eaters of the Dead: The Manuscript of Ibn Fadlan, Relating His Experiences With the Northmen in A.D. 922 Paperback – April 6, 1993 by Michael Crichton
 
It is 922 A.D. The refined Arab courtier Ibn Fadlan is accompanying a party of Viking warriors back to the north. Fadlan belatedly discovers that his job is to combat the terrors in the night that come to slaughter the Vikings--but just how he will do it, Fadlan has no idea....
 
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