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

The Empyrean series has taken the literary world by storm, with the recent 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' surge in popularity began with the debut of "Fourth Wing" in 2023, largely driven by the viral influence of Booktok. Since then, this romantasy series has grown exponentially, dominating bestseller charts across various platforms.

The release of "Onyx Storm" has introduced a fresh wave of readers to Rebecca Yarros' captivating world, showcasing the series' ability to attract a wide audience with its perfect blend of fantasy and romance. The announcement of a "Fourth Wing" TV series greenlit at Amazon further amplifies the series' potential to surpass even the iconic Harry Potter franchise in popularity, given the right strategy and execution.

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 the Empyrean series has conquered the digital realm, its physical editions are equally sought after, ranking high on Amazon's top-selling physical books list for 2025. Both the deluxe and standard editions of "Onyx Storm" secure spots in the top 10, with "Fourth Wing" maintaining its position in the top 25. The only recent challenge to "Onyx Storm's" dominance came with the release of Suzanne Collins' new Hunger Games book, which momentarily relegated it to the second spot. However, with more readers discovering the series through "Fourth Wing," we might see "Onyx Storm" reclaim its top position before the year ends.

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Fourth Wing and Iron Flame are Part of Kindle Unlimited

Kindle Unlimited

35. See subscription options. 36. See it at Amazon

For those eager to dive into the Empyrean series, the first two books, "Fourth Wing" and "Iron Flame," are currently available for free on the Kindle app with a Kindle Unlimited subscription. Subscribers can easily access these titles by logging into their Kindle account, ensuring they don't miss out on this enthralling series before the books potentially leave the subscription service.