"Christianity is not the only religion" is the message I felt was the primary focus of this book, repeated with the strength of Thor's hammer. It also goes on far too long after the most climactic events. I liked the idea of the dual storylines, also Vikings! but I wish it hadn't been so preachy. Mary Robinette Kowal does a great job narrating. Waffling between so-so and pan so I'll give it the benefit of the doubt.