Rebecca Yarros's Empyrean series continues its meteoric rise, with the recent release of Onyx Storm propelling all three books to the top of Amazon's 2025 Kindle bestsellers list. The series' popularity exploded in 2023 with the publication of Fourth Wing, largely thanks to the power of BookTok. This romantasy series has since conquered numerous bestseller charts. The success of Onyx Storm is a testament to Yarros's captivating blend of fantasy and romance, resonating with a wide readership. With an upcoming Fourth Wing TV series greenlit by Amazon, the Empyrean series is poised for even greater success, potentially surpassing even the Harry Potter franchise.

The Empyrean series' dominance isn't limited to the Kindle charts; it also features prominently in Amazon's top-selling physical books list for 2025. Both the deluxe and standard editions of Onyx Storm are in the top 10, while Fourth Wing remains in the top 25. Only the recent release of Suzanne Collins' new Hunger Games novel has nudged Onyx Storm to the second spot in fiction. However, with the ongoing influx of new readers discovering the series through Fourth Wing, this ranking could easily shift again before the year's end.

Onyx Storm (Deluxe Limited Edition)

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The first two installments of the Empyrean series, Fourth Wing and Iron Flame, are currently available for free on the Kindle app with a Kindle Unlimited subscription. Fans eager to dive into the series can access both books through their Kindle account before they potentially rotate out of the subscription service.

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