The Empyrean series made waves with the release of Onyx Storm earlier this year, catapulting all three novels to the top of Amazon's 2025 Kindle bestsellers list. The series gained mainstream traction after Fourth Wing debuted in 2023, fueled largely by BookTok's enthusiastic reception. This romantic fantasy saga has since become a publishing phenomenon, consistently ranking among the most popular titles across platforms.
The remarkable success of Onyx Storm demonstrates Rebecca Yarros' ability to captivate new audiences with her spellbinding blend of fantasy and romance. With Amazon greenlighting a Fourth Wing television adaptation, the Empyrean series could potentially surpass even the Harry Potter franchise in popularity if its momentum continues.
Print Editions Maintain Strong Sales
Onyx Storm (Deluxe Limited Edition)
Available at Amazon, Barnes & Noble, and Target
While dominating digital charts, the Empyrean series also ranks among Amazon's top-selling print books for 2025. Both the deluxe and standard editions of Onyx Storm remain in the top 10, with Fourth Wing holding steady in the top 25.
Only the recent release of Suzanne Collins' new Hunger Games novel displaced Onyx Storm from the top fiction spot. However, with continued interest in Fourth Wing attracting new readers, the rankings could shift again before year's end.
Fourth Wing and Iron Flame Available on Kindle Unlimited
Kindle Unlimited
View subscription options at Amazon
Kindle Unlimited subscribers can currently enjoy the first two Empyrean novels at no additional cost. Readers eager to start the series should download Fourth Wing and Iron Flame through their Kindle accounts before these titles potentially rotate out of the program.
