To get you interested, here is the cover art, drawn by the inestimable Micah Epstein (Click to embiggen):
So what is this about and why would you want to read it? Here’s the back of the book blurb:
Change one note and the universe changes with the Symphony.
One apprentice will become a full majus today. The other will wait months for another suitable challenger. Rilan Ayama is skilled in using her song to change the Grand Symphony of the universe, but her opponent, Vethis, is crafty, and not above a little simple bribery. Though Rilan is counting on the support of her closest friend Origon, he remains absent. She has only a cryptic note saying important matters of his family take precedence, and he needs her help. The mystery pulls Rilan’s attention away from the most important test of her life.
Maji create portals to between the far flung planets of the Great Assembly of Species, but many places still remain out of easy reach. A search for Origon’s brother leads Rilan and her friend across the wilds of one of the ten homeworlds. There, Rilan’s fledgling skills are pushed to their limits as they investigate a secret that could bring down all six houses of the maji.