Rebecca Yarros, who is known for the Empyrean series, which includes "Fourth Wing" and "Iron Flame," revealed the cover of "Onyx Storm," the third novel in the series.

The cover of Rebecca Yarros' next book, "Onyx Storm," designed by Bree Archer and Elizabeth Turner Stokes. Bree Archer, Elizabeth Turner Stokes / Entangled Publishing "It's amazing to be back with ...

The book is available for preorder. Fans in the U.S. and Canada can also purchase a deluxe edition with sprayed edges, stenciled artwork and more design features. The cover of Rebecca Yarros' ...