The Wizard of 4th Street

The prequel to this series is called The Wizard of Camelot. Wyrdrune is a student wizard with a penchant for botching spells when he meets Kira, a street-wise cutie, at an auction for the mysterious and powerful Euphrates rune stones. But he has no idea, when he tries to steal them, that the stones have already chosen him for a great adventure. From the author of the popular Timewars series.