Those She Banished (en Inglés) - D.E.K. Blair

Bennett Kelren, a pragmatic linguistics student, is catapulted from her ordinary life into the magical world of Nassaeren during a rare lunar event. Separated from her brother, Danny, she is rescued from the depths of a frozen lake by an unlikely ally. Keiran, a brooding warrior, is torn between his duty to a magic-hating king and his undeniable connection to her. As Bennett discovers her own latent magic and a forgotten heritage, she must navigate deadly court politics, escape assassins sent by a shadowy Emissary, and master her powers to rescue her captured brother and stop a dark sorceress from returning to power.