Lost rainforest: Rumi's riddle

"When the shadow walkers were victorious in their battle against the Ant Queen, they hoped their work to save Caldera was done. But the rainforest has begun to rumble. Rumi, a scholarly tree frog who can control the wind, must bring his band of animal friends to face the greatest danger they've yet encountered, the giant volcano beneath the jungle itsel. Rumi has solved many riddles to get this far, but wits and wind alone won't stop this foe"--Dust jacket.