The Empyrean: Fourth Wing (Book 1) - Rebecca Yarros Piatkus

FRIENDS. ENEMIES. LOVERS . . .
EVERYONE HAS AN AGENDA

Violet Sorrengail expected to live a quiet life surrounded by books, until she was forced onto the world's deadliest training ground. Now she must fight to join the army's elite: dragon riders. But dragons don't choose fragile riders, they incinerate them, and when your body breaks as easily as Violet's does - death is only a heartbeat away.

EVERY NIGHT COULD BE YOUR LAST

Many cadets would kill Violet to better their own chances of success; the rest would kill her just because of her last name . . . including the ruthless Xaden Riorson, her family's greatest enemy. With the odds stacked against her, Violet must use every edge her wits can give her just to see the next sunrise, because once you enter Basgiath War College, there are only two ways out:
GRADUATE OR DIE