The Knappler's Burden

There is a land beneath our feet, a land of giant caves, simmering lakes, strange creatures and people. For centuries our two worlds - Goneunderland and Upoverland - have co-existed, together but apart. But the discovery of a legendary blue crystal of immense power threatens to put the two worlds on a collision course. Goneunderland's king, his rebellious nobles, the Luxian priests, and the scheming Lady Euphansia Fish all covet the stone, and a powerful Upoverland energy magnate will stop at no