Mage's Apprentice: The Complete Series

In Mage's Apprentice, Sean Fletcher introduces all sorts of supernatural and magical races, and we learn that there is generally no love lost between “supes” and “Norms”. Enter Aspen, our Norm protagonist living in one of the magic boroughs of today's New York.

While some aspects of the story might seem overly familiar (orphan whose parents got murdered by a powerful wizard, half-giant best friend, ...), and there are many nods to other authors' works (hello, Charlotte!), Sean Fletcher provides his own spin on common tropes and delivers an entertaining tale.
As always, I enjoy his blend of action and humor, and not to forget a hefty dose of teenage shenanigans.

As is par for the course for his books (at least those I've read so far), things escalate quickly, everyone's lives are at stake, and Sean Fletcher won't let you forget it. Their fight to save supes and Norms alike from an otherwordly evil takes Aspen and her friends from New York to Europe on their search for allies, only to culminate in the final boss battle back in New York.

Although this series is set in the same world as the Heir of Dragons series, it's not necessary to have read it first to enjoy Aspen's adventures. (There are a couple of easter eggs for those who have read Kaylee's story, though. :) )