Barclay wrestles to harness his strange powers in time to save the Jungle in this heart-pounding fifth book in the New York Times bestselling Wilderlore series.

After plunging the Tundra into chaos, Audrian Keyes has set his sights on the Jungle. The new Grand Keeper resurrects an ancient order of Guardians to lure Keyes out of hiding and defeat him once and for all. But she doesn't count on Keyes having new allies nearly as villainous as he is…

Meanwhile, Barclay Thorne has sworn never to use his wild Lore again. It's too dangerous, and being the only one to share the strange power with Keyes scares him. But when he realizes wild Lore may be the only way to save the Jungle, Barclay has to break his promise to himself and bring his power into the open?especially since the Keeper of the Jungle's Legendary Beast is one of his best friends.

Yet even with the best help the Grand Keeper can give him, Barclay struggles to understand and harness wild Lore. And as he and his friends grow more desperate, Barclay faces a dire question: What if the only person who can truly teach him what he's capable of is Keyes himself?