The Scholar and the Last Faerie Door - H. G. Parry

From the author of The Magician's Daughter comes The Scholar and the Last Faerie Door, a mythic, magical tale full of secret scholarship, faerie curses, and the deadliest spells of all—the ones that friends cast on each other.
All they needed to break the world was a door, and someone to open it.

Camford, 1920. Gilded and glittering, England's secret magical academy is no place for Clover, a commoner with neither connections nor magical blood. She tells herself she has fought her way there only to find a cure for her brother Matthew, one of the few survivors of a faerie attack on the battlefields of WWI which left the doors to faerie country sealed, the study of its magic banned, and its victims cursed.
But when Clover catches the eye of golden boy Alden Lennox-Fontaine and his friends, doors that were previously closed to her are flung...