I haven't read the book, but...
Hmmm, a female rebel leader ditches her last great hope in the middle of nowhere, where it's found by a humble farm boy whose best friend has decided to leave home to see the world. Rebel leader is captured, farm boy's uncle gets toasted, farm boy links up with condescending old man who used to use magic but was betrayed by one of his own, and the evil king's minions (who rose to power by betraying the entire kingdom and killing all the other magic-users) chases farm boy while old man teaches him magic. Farm boy gets the crazy idea to go the evil fortress to rescue the rebel leader, old man dies helping them all escape, and the bad guys track them as they flee to the rebel base. Final battle is epic and deperate and the hero proves he's got what it takes to bring down the evil king's minions.
Man, I've got the feeling I've seen this plot somewhere before, but where was it?
No, seriously, I half expected the Millennium Falcon to come swooping in on Durza and his shadow-dust demon at the end there and was sorely disappointed when our Luke Skywalker clone handled his own deus ex machina. If you're going to rip off somebody else's story nearly point-for-point, at least be honest about it instead of hiding behind claims of inspiration from Nordic archetypes.