Return of the Thunderbirds  (Book, Aisha Simra E.)

Sierra has always been an outsider. Even before her parents vanished without a trace, she felt out of place. But when the Thunderbirds appear out of the blue and reveal her true identity, her life turns upside down. Whisked away to the prestigious Raveron Academy, Sierra is plunged into a world where magic is everything. The students fit neatly into their perfect categories of power, with every spell and every incantation explained and expected, unlike Sierra. But when her brother is threatened, her friends are targeted, and a student mysteriously vanishes, Sierra is forced into a relentless battle to uncover the truth. Racing from one danger to the next, she must decide whether to embrace the destiny she never asked for—or risk losing everything she holds dear. A crown. A destiny. A power that defies the rules. Will she find her identity? Will she find herself? Follow along on Sierra’s journey to find out.