The Awakening: Book 1 of Valkyrie's Curse series

Helena Eskildson is obsessed with Vikings and Norse Mythology. Neither Helena nor her sister know they are Freya's daughters - Valkyries, the shieldmaidens to Odin. When her obsession leads her to a remote site at Roskilde and its two monolithic rune stones, her destiny is awakened. While the team wages a battle between a cursed site and a sociopathic killer, time is ticking closer to Ragnarok.Will her friends be able to save her before the gjallerhorn sounds?