El fin del amanecer (Etérlume, 1)

Odette Elodie Cinwell never imagined dying so soon, much less returning to the past and receiving a second chance. After a life of suffering and injustice as the daughter of the king's advisor and betrothed to the crown prince, she decides to flee from everything in this new life and try to change the course of her future. Just when she thinks she has succeeded, that she has found her place, her whole world is turned upside down when she is summoned to the Test, in which her power will be examined to determine whether or not she should attend the Academy, the kingdom's only magic university, where candidates compete to achieve the highest scores. Anything goes at the Academy, even killing. The problem isn't just that Odette has hidden her magic for years, but that all her enemies are at the university: Prince Vesper, her betrothed; Senna, her wicked half-sister; and the darkest and most dangerous being in the kingdom, the Eternal who played a part in her death and who haunts her dreams, Rune Evander. Odette will have to survive the threats of those who want to destroy her, the dangers of the Academy, and the secrets hidden behind its walls.