The Hunter by K. Aagard

Strider is content to die...After 50 years, his revenge is complete and his purpose fulfilled. When a teenager steals the Hunter's sword, his wolf companion Greer sees a way to help them in convincing Strider to escort the girl home safely, there's hope his friend might find the will to keep on living - to keep on fighting.But this is no ordinary job. His young employer is deeply entangled in a dark plot that threatens her and her fiefdom. Strider must employ his magic and battle training to ensure their survival against soldiers and mercenaries out to claim their bounty.Can these unlikely allies find a way to survive, or will their differences and secrets destroy them all?