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

The Empyrean series has taken the literary world by storm, with the latest release, *Onyx Storm*, propelling all three books to the top of Amazon's Kindle best sellers list for 2025. The series' meteoric rise began with the publication of *Fourth Wing* in 2023, which quickly gained traction thanks to the powerful influence of Booktok. Since then, this captivating romantasy series has not only dominated bestseller charts but also captured the hearts of a vast and diverse audience.

The release of *Onyx Storm* has drawn in a fresh wave of readers, a testament to the viral appeal of Rebecca Yarros' storytelling. Her unique blend of fantasy and romance has enchanted a broad spectrum of readers. The announcement of a *Fourth Wing* TV series greenlit at Amazon further fuels the series' potential to eclipse even the iconic Harry Potter franchise in popularity, should it continue to captivate audiences.

The Physical Editions Are Popular Too

Onyx Storm (Deluxe Limited Edition)

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Beyond its digital success, the Empyrean series also shines in the physical book market, securing spots in Amazon's top-selling physical books list for 2025. Both the deluxe and standard editions of *Onyx Storm* rank within the top 10, while *Fourth Wing* maintains a strong position in the top 25. The recent release of Suzanne Collins' new Hunger Games book has shifted *Onyx Storm* to the second spot among fiction titles, yet with more readers discovering the series through *Fourth Wing*, this ranking could shift again before the year's end.

Fourth Wing and Iron Flame are Part of Kindle Unlimited

Kindle Unlimited

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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, offering a perfect opportunity to get hooked on the series before the books potentially leave the subscription service.