Like Black and Clare's The Magisterium series, this has many elements that make it similar to the now much maligned Harry Potter. (Adults are unhappy because of Rowling's inability to keep her opinions to herself, although most tweens are blissfully unaware of this.) There are stun sticks and flying shoes, a school staff with their own secret pasts, tasty magical treats, a sorting ceremony, an underdog main character, and forces of evil trying to take over the world that can only be fought by Amari. There are also timely racial issues. I can see this acquiring a solid fan base.
Students who like "academy" books like Harry Potter will be glad to join Amari on her academic adventures. Readers who like Nimmo's Charlie Bone, Horowitz's Groosham Grange, and Walden's H.I.V.E. will want to pack their bags and join the classes at the Bureau of Supernatural Affairs.