Cavern of the Fear (2001)

The Shadow Lord's evil tyranny over Deltora has ended. He and the creatures of his sorcery have been driven back across the mountains. But thousands of Deltorans are still enslaved in the Shadowlands. To rescue their friends and families, Lief, Barda, and Jasmine, heroes of the quest for the Belt of Deltora, must find a weapon powerful enough to combat the Shadow Lord's magic on his own ground. For the first time, all three books in this follow-up to the bestselling Deltora Quest fantasy series are brought together in one action-packed hardcover volume.