'I hate you! I am Gunnar, son of Bjorn Sigurdsson, and I swear on the blood of my ancestors I will take vengeance on you for the murder of my father.'
And so start an epic journey for Gunnar, young Viking boy who will not only seek to avenge the death of his dad by 'wolfmen' (the berserkers of legend, I guess) but also try and reunite with him in Valhalla. What's there not to like? It's pure kickass adventure for boys, and, Tony Bradman not taking his young audience for imbeciles, there's a lot to learn about Vikings too! Ironically enough, that might be its weakest point. If you are not sitting down with your child to help them go through it, it will indeed be difficult for them to make sense of what's really going on (e.g. Odin, the Valkyries, Valhalla, Iceland...). Plus, some chapters, especially towards the end, are indeed poorly structured, and, so, confusing -my boy, 8 at the time of reading, actually complained of them being 'difficult to understand'.
Never mind! Overall, my son loved it (and so did I). He gave it a four star rating, so... So did I!