"A storyline with twists aplenty." -- Kirkus Reviews

The highly anticipated final installment in the intricately plotted, action-packed, animal-based fantasy series that New York Times #1 bestselling author Kelly Armstrong calls "A thrilling tale."

It's been seven years since the Denizens, people with elemental powers, were unmasked, and seven years since Roan Harken and Eli Rathgar disappeared into the Brilliant Dark.

Marked by Darklings and Death alike, Saskia is a mechanically minded Mundane, raised by Barton and Phae on daring stories about Roan Harken. But the world Roan left behind is in turmoil. The Darklings now hang in the sky as a threatening black moon, and with the order-maintaining Elemental Task Guard looking to get rid of all Denizens before they rebel, Saskia's only option is to go into the Brilliant Dark and bring Roan and Eli back.

But nothing is ever that simple.

The Brilliant Dark is the final, thrilling chapter in this series about gods, monsters, and the people who must decide if they're willing to pay the ultimate price to protect the family they found . . . in a world that may not be worthy of saving.