The Fourth Wing Books are Dominating Amazon's Kindle Best Sellers List in 2025 So Far

Rebecca Yarros's Empyrean series continues its meteoric rise, with the recent release of Onyx Storm propelling all three books to the top of Amazon's 2025 Kindle bestsellers list. The series' popularity exploded in 2023 following the release of Fourth Wing, largely due to the enthusiastic support of BookTok. This romantasy series has since conquered numerous bestseller charts.

The Physical Editions Are Also Flying Off Shelves

### Onyx Storm (Deluxe Limited Edition)

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While dominating the Kindle charts, the Empyrean series also holds a prominent position on Amazon's 2025 top-selling physical books list. Both the deluxe and standard editions of Onyx Storm are in the top 10, with Fourth Wing remaining in the top 25.

Only the recent release of Suzanne Collins' new Hunger Games novel has dethroned Onyx Storm from the number one fiction spot. However, with the ongoing influx of new readers discovering the series through Fourth Wing, this ranking could easily shift again before the end of 2025.

Dive In: Fourth Wing and Iron Flame Available on Kindle Unlimited

### Kindle Unlimited

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For Kindle Unlimited subscribers, the first two books in the Empyrean series, Fourth Wing and Iron Flame, are currently available for free. Don't miss your chance to jump into this captivating series—download them from your Kindle account before they're no longer included in your subscription.