School of the Ages:
The Ghost in the Crystal
YA Urban Fantasy Fiction by Matt Posner
America's greatest magic school is New York City's School of the Ages. Simon is a teen from Queens, New York. When he answers an advertisement in a magazine, the South Wind shows up at his door to introduce him to a world of adventure, power, and tragedy that feels both strange and right: ghosts, elementals, time travel, magic duels, teen romance, sacrifice, and ultimate loss. The evil spirit of a bitter and scheming heretic from ancient Alexandria attacks him and forces him to risk everything in order to save his soul. Kids and adults won't stop reading -- The Ghost in the Crystal.