Grey Hunter : A Space Wolves (Warhammer 40K) Novel by William King - Paperback USED

When the dark forces of Chaos seize one of their Chapter's holiest artifacts, Ragnar and his Space Wolf comrades embark on a perilous quest to retrieve it before an ancient and terrible foe can be set free. 

This is the third novel in the Space Wolves series by William King.  Set in the universe of Warhammer 40,000, preceding titles were Ragnar's Claw and Space Wolf.