Falls the Shadow (The Chronicles of Midgard, #1)

Everything had been taken from her: her family, her home, and nearly her life. Now, two years later, Mæja is still haunted by what the Empire did to her. But a new deception is afoot: the Empire is seeking five sacred treasures to reawaken the dark god, Loki, which could plunge all of Midgard into irreparable darkness....
With betrayal fresh in mind, she seeks to reclaim the ancient treasures before they fall into enemy hands. She is joined by the pirate Ril and his accomplice Mjrn, and the roguish rebels Connor and Linkyn.
Their unlikely alliance is now the only defense against an Empire that could destroy all of Midgard...