The Empyrean series has soared to fame, capturing readers' hearts with its unique premise and skyrocketing to popularity thanks to viral buzz on TikTok. The series kicked off with "Fourth Wing," which has been a mainstay on Amazon's top-sellers list since its release in 2023. The excitement continues with "Onyx Storm," the latest installment by Rebecca Yarros, which secured the number two spot for preorders on Amazon in 2024.
Onyx Storm is set to hit the shelves on Tuesday, January 21. Currently, preorders are available at a discount on Amazon. If you're new to the series, you're in luck: the first two books, "Fourth Wing" and "Iron Flame," are available for free with a Kindle Unlimited subscription for a limited time.
Onyx Storm Preorders

Onyx Storm (Standard Edition)
Both Hardcover and Kindle versions of the standard edition are available at a discount:
- Hardcover: Originally $29.99, now $20.98 (save 30%)
- Kindle: Originally $29.99, now $14.99 (save 50%)
Preorders for the standard version are discounted, but the deluxe edition remains at full price, and paperback versions are not yet available. For more purchasing options, check out our comprehensive guide on where to buy books online.
What Is the Empyrean Series About?
When I first delved into the series, a friend described "Fourth Wing" as "Harry Potter, but with dragons." While this is somewhat accurate initially, the narrative quickly evolves, drawing more parallels to the Twilight series. The Empyrean series is a magical, fantasy romance that delves deeply into graphic details.
The story follows Violet Sorrengail, a seemingly delicate young woman thrust into the perilous world of dragon riders by her influential mother. As Violet navigates her challenges and weaknesses, she grapples with complex emotions toward her mother, an old friend, and a boy she initially believes is her enemy. Amidst this, deeper mysteries involving the dragons and her world unfold, placing Violet at the epicenter of an intense romance and broader intrigue.
Fourth Wing and Iron Flame on Kindle Unlimited

Kindle Unlimited
The first two books of the Empyrean series, "Fourth Wing" and "Iron Flame," are currently free with a Kindle Unlimited subscription. To dive into the series, simply log into your Kindle account and download these titles before they are removed from the subscription service.