The Empyrean series, which gained immense popularity with the release of "Fourth Wing" in 2023, has continued its ascent with the latest addition, "Onyx Storm," released earlier this year. Now, all three books in the series are dominating Amazon's Kindle best sellers list for 2025, a testament to the series' skyrocketing popularity, largely fueled by the viral influence of Booktok. Rebecca Yarros' unique blend of fantasy and romance has captivated a wide audience, making the Empyrean series a standout in the romantasy genre. With the announcement of a "Fourth Wing" TV series being greenlit at Amazon, there's a real possibility that the Empyrean series could surpass even the iconic Harry Potter franchise in popularity if it continues to play its cards right.
The Physical Editions Are Popular Too
Onyx Storm (Deluxe Limited Edition)
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The success of the Empyrean series extends beyond digital platforms, as it also tops Amazon's list of best-selling physical books for 2025. Both the deluxe and standard editions of "Onyx Storm" rank within the top 10, while "Fourth Wing" secures a spot in the top 25. Although "Onyx Storm" has slipped to the second spot following the release of Suzanne Collins' latest Hunger Games book, the series' continued growth, driven by new readers discovering "Fourth Wing," suggests that it may reclaim the top position by the end of 2025.
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Fourth Wing and Iron Flame are Part of Kindle Unlimited
Kindle Unlimited
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For those eager to dive into the series, the first two books, "Fourth Wing" and "Iron Flame," are available for free on the Kindle app through a Kindle Unlimited subscription. Subscribers can easily access these titles by logging into their Kindle account, providing a convenient and cost-effective way to start their journey with the Empyrean series before the books are potentially removed from the subscription service.
