The Seekers and the Sword — Michael Jan Friedman

Created in dark dwarvin caverns by a master smith, with mystic runes carved into its gleaming hilt and spells of blood to bind it with power, this was the legendary sword of Frey -- the magical brand that brought victory to its wielder. Now two mighty gods seek the sword -- Ygg the Destroyer, who longs to obliterate Asgard and Earth, and Vidar, the bastard son of Odin trying to save both worlds from Ygg's mad campaign. Through the Gates between Worlds, with the forces of the Aesir, mortals, elves, and giants behind him, Vidar must race the deadly pawns of a crazed deity to prevent a second Twilight of the Gods.