It's one where he ends up in the elven realm and I think he's a prince or royalty. He trains to learn different magic and joins in the military but has to start at the bottom even though he's the prince because the general or whatever doesn't like him or know he's the prince at first.

There's also another one...or maybe they are the same...but Harry crafts powerful magical swords for all of his friends...I think they are filled with raw magic, and made of a crystal-type material, but maybe not I can't really remember....