Onyx Storm (Deluxe Limited Edition) is the third installment in The Empyrean series by bestselling author Rebecca Yarros, published by Entangled: Red Tower Books on January 21, 2025. This 544-page hardcover collector's edition features gorgeous sprayed edges with stenciled dragon artwork and exclusive special design elements not found in the standard edition, available in limited quantities in the US and Canada only.

After nearly eighteen months at Basgiath War College, Violet Sorrengail knows there's no more time for lessons — the battle has truly begun. With enemies closing in from outside their walls and within their own ranks, it's impossible to know who to trust. Now Violet must journey beyond the failing Aretian wards to seek allies from unfamiliar lands to stand with Navarre. The trip will test every bit of her wit, luck, and strength, but she will do anything to save what she loves — her dragons, her family, her home, and him. Even if it means keeping a secret so big it could destroy everything. They need an army, they need power, they need magic — and they need the one thing only Violet can find: the truth. But a storm is coming, and not everyone can survive its wrath.

The Empyrean series is best enjoyed in order: Book 1 — Fourth Wing (May 2023), Book 2 — Iron Flame (November 2023), Book 3 — Onyx Storm (January 2025). The series became a viral sensation through BookTok, and a television adaptation is in development at Amazon MGM Studios with Michael B. Jordan's Outlier Society production company.