William King
Space Wolf
Space Wolf (series) part 1

The saga of Ragnar Blackmane begins! From savage tribesman in the cold wastes of Fenris to superhuman warrior of the Space Wolves Chapter, this tale charts the beginnings of the Young Wolf, the birth of a hero of the Imperium.
Warhammer 40k
novel

Also in:
Hall of Fame: Year One
The Space Wolf Omnibus