The Empyrean series has soared to new heights with the recent release of "Onyx Storm" earlier this year, propelling all three books to the top of Amazon's Kindle best sellers list for 2025. The series' ascent to fame began with the publication of "Fourth Wing" in 2023, which quickly gained traction thanks to the viral power of BookTok. Since then, this romantasy series has grown immensely popular, dominating bestseller charts across various platforms.
Amazon best selling kindle books
The release of "Onyx Storm" has attracted a surge of new readers, highlighting the captivating allure of Rebecca Yarros' writing. The perfect blend of fantasy and romance has enchanted a wide audience. With a "Fourth Wing" TV series now greenlit by Amazon, the Empyrean series has the potential to eclipse even the Harry Potter franchise in popularity, provided it capitalizes on this momentum.
The Physical Editions Are Popular Too
### Onyx Storm (Deluxe Limited Edition)
1See it at AmazonSee it at Barnes and NobleSee it at Target
While the Empyrean series dominates the Kindle charts, it also holds strong in Amazon's top-selling physical books list for 2025. Both the deluxe and standard editions of "Onyx Storm" are among the top 10, and "Fourth Wing" remains a steady presence in the top 25.
The only recent shift in rankings came with the official release of Suzanne Collins' new Hunger Games book, which has nudged "Onyx Storm" to the second spot among fiction titles. However, with an increasing number of readers diving into the series through "Fourth Wing," there's a possibility we'll see "Onyx Storm" reclaim its lead before the end of 2025.
AnswerSee ResultsFourth Wing and Iron Flame are Part of Kindle Unlimited
### Kindle Unlimited
35See subscription options.See it at Amazon
For those eager to join the Empyrean saga, "Fourth Wing" and "Iron Flame" are currently available for free on the Kindle app through a Kindle Unlimited subscription. To start your journey with the series, simply log into your Kindle account and download these titles before they potentially leave the subscription service.
