Amari and the Night Brothers by B. B. Alston

When Amari’s brother Quintin goes missing, it seems she’s alone in thinking he’s still alive. A ticking briefcase in his closet leads her to the Bureau of Supernatural Affairs and the discovery that he is a very powerful magician. And so is she. And the entire bureau wants rid of her. Fast-paced, full of magic, humour, betrayal, supernatural critters, villains and surprising twists and turns, this is a cracking debut! Ages 10+