The Empyrean series has taken the literary world by storm, with the latest release, Onyx Storm, contributing to all three books topping Amazon's Kindle best sellers list for 2025. The series' surge in popularity began with the release of Fourth Wing in 2023, largely fueled by the viral influence of Booktok. Since then, this captivating romantasy series has not only dominated Kindle charts but has also become a staple on various bestseller lists.
The success of Onyx Storm has attracted a wave of new readers, a testament to Rebecca Yarros' engaging blend of fantasy and romance. Her writing has captured the hearts of a diverse audience, and with a Fourth Wing TV series now greenlit at Amazon, the Empyrean series is poised to potentially surpass even the Harry Potter franchise in popularity if it leverages its momentum effectively.
The Physical Editions Are Popular Too
Onyx Storm (Deluxe Limited Edition)
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The series' success extends beyond digital formats, as it also claims a significant presence on Amazon's top-selling physical books list for 2025. Both the deluxe and standard editions of Onyx Storm are within the top 10, while Fourth Wing secures a spot in the top 25. The only book to temporarily eclipse Onyx Storm's position as the top fiction book is the new release from Suzanne Collins' Hunger Games series. However, with an increasing number of readers starting with Fourth Wing, the rankings could shift again before the year ends.
Answer See ResultsFourth 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 and downloading them before they potentially leave the subscription service.
