Nathan Long
Orcslayer
Gotrek & Felix (series) part 8

Gotrek and Felix delve into the dark places of the world once again to fulfil an ancient oath and help a prince reclaim his realm. But with greenskins around every corner, Gotrek's doom could be at hand.
Warhammer
novel

Also in:
Gotrek & Felix: the Third Omnibus
Gotrek & Felix: the Complete Journey