This is book 2 of The Gryphon Chronicles. The gang is headed to Norway where Archie is attending the Invention Convention where he will unveil his flying machine and meet his scientific heroes. Jake and Archie get more than they bargained for when they meet Snorri the Giant. He accidentally opened a hole in the sky between humans and giants. The boys have adventures with giants and the residents of Valhalla.
I enjoyed this book. I loved how the Norse gods, Viking legends and myths, as well as Norwegian myths and stories are woven into the story line. I liked watching Jake and Archie see the legends, stories, and myths come alive as they help Snorri return home and win his love. I also liked how the boys had conflicts and got angry with each other but resolved their issues as they worked together to help Snoori and get out of Valhalla alive.
I look forward to more of the series.