Swords Against Darkness by Paula Guran (big collection of sword and sorcery short stories across times)

The Original Sword-and-Sorcery Epic in a New, Author-Approved Edition! Oron the Wolf, a barbarian outlander, rises to become a commander in the army of General Amrik of Salasal. But the young fighter is meant for greatness far above military service. Read more

Omnibus version of Gotrek&Felix adventures first here ,  second third fourth fifth