Sophie Foster is struggling. Grieving. Scrambling. But she knows one thing: she will not be defeated.

The Neverseen have had their victories – but the battle is far from over. It’s time to change tactics. Make sacrifices. Re-examine everything. Maybe even time for Sophie to trust her enemies.

All paths lead to Nightfall – an ominous door to an even more ominous place – and Sophie and her friends strike a dangerous bargain to get there. But nothing can prepare them for what they discover. The problems they’re facing stretch deep into their history. And with time running out, and mistakes catching up with them, Sophie and her allies must join forces in ways they never have before.

In this spectacular sixth book in the New York Times bestselling Keeper of the Lost Cities series, Sophie must uncover the truth about the Lost Cities’ insidious past, before it repeats itself and changes reality.

THE FUTURE IS LOADING . . .

For decades, the world has been caught in a cold war between two powerful nations: Medaluo and Atahua. The Medan orphans who live in Atahua suffer the cost. Their enrollment at Nile Military Academy is mandatory. Either serve as a soldier, or risk being labelled a spy.

Eighteen-year-old Eirale is one such orphan. Having recently graduated and joined NileCorp's forces, she's doing well for herself - until Atahua's most wanted anarchist frames her for assassinating a government official and she's given a choice: cooperate with him to search for a dangerous program in Medaluo or go down for treason.

Meanwhile, seventeen-year-old Lia is close to her own graduation when she's paired with her academic nemesis for one final assignment. But when they are ordered to infiltrate Medaluo in virtual reality, Lia quickly realises there is much more at stake than her school ranking.

As Eirale and Lia tear through Medaluo on separate courses, the two start to suspect they are pieces in a larger conspiracy - and the closer they get to the truth, the closer their worlds come to a shattering collision.

After seven goblins try to steal it, the Rainbow is careful never again to touch the earth.

Danyana "Yana" Morneen, the only child of a widowed cobbler, has always wondered why the forest seems so sad. Dark and lifeless, it sits on the outskirts of town, never producing the lush greenness she longs for. As Yana explores the secrets of the forest, she tries in vain to keep an admirer's advances at bay.

Many women in the village desire Nicolas Vanlock, the wealthy, handsome son of a local merchant, but he only has eyes for Yana. For as long as she can remember, Nicolas has been trying to force himself into her life, and now he desires marriage. But Yana knows that her destiny does not lie with Nicolas.

As she ventures further into the forest and its secrets, Yana discovers a lush, hidden estate in the very heart of the woods and is surrounded by magic she cannot comprehend. Her visits to the property's garden of roses become more frequent, and she becomes aware of a presence in the dilapidated old mansion. Nicolas fears he is losing his true love to another, and he begins a relentless campaign to claim Yana's heart.

If Nicolas has his way, Yana will never be allowed to enter the enchanted forest again .

When they travel to Anthropos to search for their missing uncle and his bride, the cousins become part of a fierce battle between Gaal and the evil sorcerer who seeks to destroy him.