Fourth Wing Tops Amazon Kindle Bestsellers in 2025

The Empyrean series achieved major success with its latest release Onyx Storm earlier this year, now dominating Amazon's Kindle best sellers list for 2025. The series' popularity surged when Fourth Wing first debuted in 2023, largely propelled by BookTok. Since then, this romantic fantasy series has grown exponentially, consistently ranking at the top of most bestseller charts.

The overwhelming response to Onyx Storm demonstrates the viral power of Rebecca Yarros' writing. Her perfect blend of fantasy and romance captivates a diverse audience. With Amazon officially greenlighting a Fourth Wing TV adaptation, the Empyrean series could potentially surpass even the Harry Potter franchise in popularity if executed well.

The Physical Editions Are Popular Too

Onyx Storm (Deluxe Limited Edition)

1. See it at Amazon
2. See it at Barnes and Noble
3. See it at Target

While dominating Kindle charts, the Empyrean series also ranks among Amazon's top-selling physical books for 2025. Both the deluxe and standard editions of Onyx Storm feature in the top 10, while Fourth Wing remains in the top 25.

Only the recent release of Suzanne Collins' new Hunger Games novel has temporarily dethroned Onyx Storm from the #1 fiction spot. However, with new readers continually discovering the series through Fourth Wing, the rankings could shift again before 2025 concludes.

Fourth Wing and Iron Flame Are Part of Kindle Unlimited

Kindle Unlimited

The first two Empyrean novels are currently available for free on the Kindle app with a Kindle Unlimited subscription. Readers can download both Fourth Wing and Iron Flame to their Kindle account before these titles potentially rotate out of the subscription service.