The Avatar Trilogy

I've known Conor Kostick, author of the books Epic, Saga and Edda for almost 30 years, going back to the days of Treasure Trap and Peckforton Castle and the Bent Street days. If you have a teenage boy (or girl) in your family get them these books via Amazon - sadly you can't get them in England. Conor lectures in Medieval History at Trinity College, Dublin and is a real polymath.