It’s been many moons since Ivypool lost her daughter Bristlefrost to the Dark Forest, yet Ivypool can’t bear to move on. Even being named Deputy of ThunderClan—a role she earlier would have relished—feels meaningless amid the pain of her grief.

When Whistlepaw has a disturbing vision—one that could spell disaster for all the Clans—a group of cats is selected to go on a quest to investigate. Ivypool is happy to join their mission. Perhaps being away from her daily responsibilities will help her escape the painful memory of Bristlefrost’s death.

The cats set out on an arduous journey, facing everything from painful hunger to bloodthirsty dogs. But nothing can prepare them for what they find: a disgusting Twoleg den that’s caging a series of strange animals, including two who may have surprising ties to the Clans.

In order to complete their quest and right a terrible wrong that goes back generations, the five Clan cats must help these creatures find their true home. But first, Ivypool must let go of the past, and her grief, if she is to have any hope of ensuring a future for the Clans—and for herself.

The Great Abandonment has begun, and now dragons aren’t the only creatures facing extinction in the Fallen Isles.

As entire islands rise up from the sea, causing earthquakes, tidal waves, and utter devastation, Mira must use her growing connection with dragons to track a legendary treasure that could stop the destruction—the bones of the first dragon. But finding the treasure means traveling into the land of her greatest enemies.

What will it cost Mira to save the dragons, the people she loves, and the only home she’s ever known from total ruin? And what will be left of Mira once the final cataclysm is over?