The Empyrean Series (3 Books) by Rebecca Yarros

The Empyrean Series 3 Books Collection Set By Rebecca Yarros (Fourth Wing, Iron Flame & Onyx Storm):

Onyx Storm:
ARE YOU READY TO BRAVE THE DARK? After nearly eighteen months at Basgiath War College, Violet Sorrengail knows there's no more time for lessons. No more time for uncertainty. Because the battle has truly begun, and with enemies closing in from outside their walls and within their ranks, it's impossible to know who to trust.Now Violet must journey.

Fourth Wing:
Welcome to the brutal and elite world of Basgiath War College . . .Twenty-year-old Violet Sorrengail was supposed to enter the Scribe Quadrant, living a quiet life among books and history. Now, the commanding general - also known as her tough-as-talons mother - has ordered Violet to join the hundreds of candidates striving to become the elite of Navarre: dragon riders.

Iron Flame:
ECRETS. SACRIFICE. SURVIVAL.Against all odds, Violet Sorrengail made it through her first year at Basgiath War College, but now, the real training begins. The stakes are higher than ever, and a determination to survive won't be enough this time.When a powerful new enemy threatens everything she cares about, including the man she loves, Violet must do whatever it takes to keep their secrets safe.