Originally published by Marvel in 2004, Akira Yoshida and Greg Tocchini’s “Thor, Son of Asgard” series (Gr 6 Up) focuses on the great warrior’s teenage years, long before he had the wherewithal to wield the mighty hammer Mjolnir. Spotlight has published the first six issues, relating this complete story arc, in reinforced library bound editions with reader-grabbing covers. Each sturdy volume begins with a plot recap, allowing readers to brush up on previous events and read the stories out of sequence.