Old Warhammer Book Trilogy?

The book is about a young lad who is friends with a rich girl they get attacked by a Mutant beast and the boy kills it, soon after their village is destroyed by Mutant Beasts the boy escapes and sees a Evil Warrior go past with a Wolf Helmet a while later he meets another Warrior who he falls in with and joins as a companion learning to be a mercenary he learns that the Evil Warrior is the second warriors Brother, the second warrior has had his appearance altered to look more like a Wolf. I remember in the second book they are encamped in a Dwarf Town and the boy sees the Evil Warriors reflection in some mirrors used to light up an old tunnel and chases off alone to try and catch up with him (Never found the third book) If you know this series please let me know as I would love to reread the first 2 books and finally finish the series off, Thanks!