Loki's Wrath (The Chronos Series)

Book 2 of The Chronos Series finds young Alex thrown into a battle between the old Norse gods, a battle to end all battles. It wasn't exactly what Alex had planned; but if Egypt taught him anything, it was that nothing goes as planned. This new place was indeed different, and to make matters worse, it may not be the first time he'd been there. Now, with the adventures of Egypt behind him and still far from home, Alex learns of Loki's evil plan, and must once again rewrite history.