The Seventh Spell - Davis Bunn

Two planets. Seven spells. One battle for survival.
Adrian Capstan's dream of going to Mars and becoming a wizard is about to be realized when he travels to the red planet armed with seven ancient spells. By connecting to magical forces on Mars, he hopes he'll finally be able to bring the mysterious spells alive.
But when Adrian lands at the Mars spaceport, he discovers a scene of destruction. Revolt against Earth has led to a dangerous regime ruling the planet, and the wizards are under attack. As Adrian begins to unlock the spells, he is drawn into an epic fight for survival.And when he unleashes the seventh spell's true power, the stakes for the two planets couldn't be higher . . .