William King
Dragonslayer
Gotrek & Felix (series) part 4

A journey back to civilisation is interrupted when Gotrek, Felix and their companions encounter a creature of myth – a legendary dragon! Caught between that flying rock and the hard place of an army of orcs, things look bleak…
Warhammer
novel

Also in:
Gotrek & Felix: the Complete Journey
Gotrek And Felix: the Second Omnibus