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

The Empyrean series has taken the literary world by storm, with the latest installment, *Onyx Storm*, released 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 fueled by the viral sensation on Booktok. Since then, this romantasy series has captured the hearts of readers worldwide, dominating bestseller charts across various platforms.

The release of *Onyx Storm* has not only attracted new readers but also highlighted the captivating blend of fantasy and romance crafted by Rebecca Yarros. This unique mix has resonated with a wide audience, drawing them into the enchanting world of the Empyrean series. The announcement of a *Fourth Wing* TV series in development at Amazon further cements the series' potential to outshine even the iconic Harry Potter franchise, provided it leverages its momentum effectively.

The Physical Editions Are Popular Too

Onyx Storm (Deluxe Limited Edition)

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While the Empyrean series dominates the digital realm, its physical editions are equally in demand, featuring prominently 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* holding steady in the top 25. The only book to momentarily eclipse *Onyx Storm* in the fiction category is the latest release from Suzanne Collins' Hunger Games series. However, with more readers discovering the Empyrean saga through *Fourth Wing*, the rankings could shift once again before the year ends.

Fourth Wing and Iron Flame are Part of Kindle Unlimited

Kindle Unlimited

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For those eager to dive into the series, *Fourth Wing* and *Iron Flame* are available for free reading on the Kindle app through a Kindle Unlimited subscription. Subscribers can easily access and download these books before they potentially exit the subscription service, offering a cost-effective way to experience the enthralling world of the Empyrean series.