The Empirium Trilogy 3 Books Collection Set by Claire Legrand (Furyborn, Kingsbane, Lightbringer)

Furyborn When assassins ambush her best friend, Rielle Dardenne risks everything to save him, exposing herself as one of a pair of prophesied queens: a queen of light, and one of blood. To prove she is the Sun Queen, Rielle must endure seven elemental magic trials. If she fails, she will be executed as the Blood Queen...unless the trials kill the queen first. Kingsbane Rielle Dardenne has been anointed Sun Queen, but her trials are far from over. The Gate keeping the angels at bay is falling. To repair it, Rielle must collect the seven hidden castings of the saints. Meanwhile, to help her prince and love Audric protect Celdaria, Rielle must spy on the angel Corien-but his promises of freedom and power may prove too tempting to resist. Lightbringer Queen Rielle, pushed away from everything she loves, turns to Corien and his promises of glory. Meanwhile, whispers from the empirium slowly drive her mad, urging her to open the Gate. Separated from Audric and Ludivine, she embraces the role of Blood Queen and her place by Corien's side, determined to become the monster the world believes her to be.