Book excerpt: One day in the distant future, Thor, the Norse god of thunder, is destined to battle the giant snake that threatens to devour the world. Until then, mortals of Middle Earth look to Thor and his magic hammer for protection from evil. In this third volume of the Secrets of the Ancient Gods series, Thor takes time from his duties to lead readers through the mythological Norse realms, those mysterious worlds that are home to gods, giants, elves, and monsters. He also delves into the age of the Vikings and reveals how they lived and what they believed. Using Thor as her humorous narrator, author Vicky Alvear Shecter provides a well-researched and unconventional nonfiction introduction to Norse mythology. Includes a glossary, bibliography, and index.