The Last Hero - Wayfarers

Freydis was rescued from a deadly blizzard by the goddess Freyja when she was a baby, but Freyja left her brother Haakon to survive on his own. When Haakon died Freyja refused Freydis's plea to bring him to her Hall of the People. The Fates told Freydis they would help her rescue him from Hel if she shepherded one thousand souls to Freyja's realm. Now, after five hundred years back on Midgard, Freydis only has two more souls to find.