From Crimson Ashes

Dawnhart: From Crimson Ashes is the first book in an epic YA dark fantasy saga of found family, magical progression, coming of age, and slow-burn romance. Six years ago, Nera demons turned everything Maximus loved to ash. He's spent every day since training to make sure it never happens again. Max, his sister Mia, and his best friend Blake were brought to Summora, a stark mountain fortress and elite academy of the Royal Dawn. In a world where light is power, paid for with years of life, every student is measured by the strength of their Radiance. The blade that chooses Max is unlike any other: Infinity. Demanding more with every strike, threatening to consume him from within. Max, alongside the only family he has left, must fight for his place, his purpose, and each other. The dawn is coming. Whether it saves everything he loves or burns it all again depends on what Max is willing to sacrifice to stop the darkness.