Akata Warrior

A year ago, Sunny Nwazue, an American-born girl Nigerian girl, was inducted into the secret Leopard Society. As she began to develop her magical powers, Sunny learned that she had been chosen to lead a dangerous mission to avert an apocalypse, brought about by the terrifying masquerade, Ekwensu. Now, stronger, feistier, and a bit older, Sunny is studying with her mentor Sugar Cream and struggling to unlock the secrets in her strange Nsibidi book.

Eventually, Sunny knows she must confront her destiny. With the support of her Leopard Society friends, Orlu, Chichi, and Sasha, and of her spirit face, Anyanwu, she will travel through worlds both visible and invisible to the mysteries town of Osisi, where she will fight a climactic battle to save humanity.

Synopsis from Open Library.