The Circlet of Power - Avatar of Fire by Matthew Stewart Book Summary:
Kat Veldarin is filled with pride when the master of the Thieves Guild assigns her to retrieve an artifact from a local mage. Eager to prove herself, Kat sets out to claim her due.Stealing the battered golden circlet is the easy part. When Kat escapes the wizard's tower, she finds that news of her victory has preceded her, and not with the results she had imagined.Met with betrayal, Kat flees for her life, assassins in close pursuit. Seeking a mercenary to protect her, she finds Erebus: a cold and bitter warrior cursed with eternal life.Kat has unwittingly joined a hidden struggle. The circlet she carries is the heart of an ancient weapon, and the key to power enough to master the world - or destroy it.Roused from millennia of slumber, the eternal forces imprisoned within the fragments of this great weapon begin to stir, attracting the notice of mortals and immortals alike. The reforging of the Circlet of Power is about to begin.