Deathborne - Dragon Seer, #1

Deathborne follows Nadraya, a desert princess kept locked away as a precaution against the deadly plague that has ravaged her kingdom for generations. When her sister falls victim to the disease, she makes the reckless decision to sneak away with a band of strangers headed north, where they hope to find evidence of a cure. Together, they create a mismatched crew-a runaway princess, a retired assassin and his two disorderly cohorts, an incompetent wizard, a reluctant knight just trying to do his job, and a ranger cruelly exiled by his people.
Their differences separate them as clearly as sand from water, but as their quest spirals out of control, those differences begin to fade in favor of unlikely friendships. Faced with bandits, dragons of lore, dark magic, and a growing army of undead, they discover more during their quest than any legends of old could have prepared them for. Even Nadraya, who has always been troubled by unpredictable visions and disturbing dreams, is shocked at the dark secrets that threaten to unhinge the entire world of Vraed.