That’s an excellent series by a pretty fun story. There’s an older example that I once read, but at the moment all I can remember is that the spells are calibrated to the exact physical state of the world at the time of casting (like that one xkcd comic). As a result, the protagonist foils enemy spells by doing things like causing worms to shift in the dirt or rocks to fall over.

Though the system doesn’t really hold up to scrutiny, I enjoyed the book. Hopefully someone remembers the premise and can tell me the title.

If you liked Magic 2.0, you would almost certainly enjoy the older YA series WebMage.