Fourth Wing Books Top Amazon's Kindle Best Sellers in 2025

The Empyrean series has soared to new heights with the release of "Onyx Storm" earlier this year, propelling all three books to the top of Amazon's Kindle best sellers list for 2025. The series first gained widespread attention with the release of "Fourth Wing" in 2023, largely thanks to the influence of Booktok. Since then, Rebecca Yarros' romantasy series has captured the hearts of readers worldwide, dominating bestseller charts with its perfect blend of fantasy and romance.

Amazon best selling kindle books

The viral success of "Onyx Storm" has attracted a fresh wave of readers, showcasing the captivating allure of Yarros' storytelling. With the announcement of a "Fourth Wing" TV series greenlit by Amazon, the Empyrean series is poised to potentially outshine even the legendary Harry Potter franchise, given the right momentum.

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

Not only does the Empyrean series dominate the Kindle charts, but it also holds a strong presence on Amazon's top-selling physical books list for 2025. The deluxe and standard editions of "Onyx Storm" are firmly in the top 10, while "Fourth Wing" continues to linger in the top 25. The recent release of Suzanne Collins' new Hunger Games book has nudged "Onyx Storm" to the second spot on the fiction list, but with more readers discovering the series through "Fourth Wing," it's possible we'll see a resurgence before the year's end.

Fourth Wing and Iron Flame are Part of Kindle Unlimited

Kindle Unlimited

35. See subscription options.
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For those eager to dive into the series, "Fourth Wing" and "Iron Flame" are currently available for free through a Kindle Unlimited subscription. Subscribers can access these titles on the Kindle app, making it an excellent opportunity to start the Empyrean journey before the books potentially leave the subscription service.