Three worlds. Ancient magic. And one hidden heir caught at the centre of it all.

Vivienne Valeran has spent years hiding who she truly is. As the Archdruid's daughter, discovery could cost her everything, and returning to the floating isles of Estralia under a false identity to join the wardens who guard the borders between realms makes keeping that secret harder than ever.

Especially now that darkness is stirring. Old wards are failing, forbidden creatures are rising from the ruins below, and a dead island has surfaced from the mist, draining the life from anyone who touches its shores. At the same time, Vivienne's own magic is changing.

With her fellow wardens beside her, and her bond with Diego pulling her toward truths she's tried to bury, Vivienne must uncover what's threatening the realms before it all collapses. But the deeper she searches, the more dangerous the truth becomes: something ancient is waking, and she may be far more connected to it than anyone realises.

Enter a world of floating islands, forbidden magic, ancient enemies, and bonds strong enough to cross the boundaries between worlds, in this four-book fantasy box set.