Kelley Armstrong <br/><br/>
Odin's ravens 

 - New York :   Little, Brown and Company,   2014. 
 - 342 p. :  ill. 
 - The Blackwell pages ;  book 2. .
<br/><br/> When Ragnarok--the apocalypse--threatens, the human descendants of the gods band together to fight monsters, and Matt Thorsen and his friends must journey to the underworld to save a descendant. 
<br/><br/><label>ISBN: </label>9780316204989 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adventure stories<br/>Paranormal fiction<br/>Shapeshifting --Fiction