I have read this series of books to my now 14 year old when he was younger and my now 7 year old and listened to the story CDs with all of the family including an older teenager on long journeys. I have found them to be enjoyed by both boys and girls. These are engaging stories which are irreverent enough to appeal to teenagers and pre-teens alike, they have humour that works on several levels, and I have to admit I thoroughly enjoy them myself as a middle aged man. Above all they are, perhaps surprisingly, quite aspirational with the geeks and the weak winning the day over the popular and the thugs, and winning by true self-sacrificial bravery and intelligence rather than by physical strength. This is an encouraging theme in our society of celebrity where the popular and the ignorant bully so often seem to win (whatever that means). For anyone who has seen the film/movie the books & CDs are almost unrecognisably better, and although the film was enjoyable it was an extreme Hollywoodisation of the original story to the point of being pretty much a completely different story with some of the same names (i.e. not even the same characters). David Tennant does a superlative job of reading the audio books. He uses a wide range of accents including special ones for the dragons which are pretty infectious and I now make some attempt at when reading the books. The Scottish accent in many guises seems appropriate for Vikings (not entirely surprising given the real life history of Viking colonisation). To summaraise if you are going on a long journey with children 6-16 this will keep them quiet for many an hour.