The Crown Jewels of Undlar

Six siblings awaken from a mysterious sleep to find themselves in a beautiful but perilous land called Undlar that is missing some important things. The residents of Undlar are missing from their villages and fields, cowering in fear from the menace that haunts their skies and woods. The Lord of the land is missing from his throne, and is presumed to be asleep in his tower. The jewels which brought order and harmony to Undlar are missing from the Lord's Crown, and are scattered and lost.Also missing are mysterious visitors who are foretold to be the ones to find the missing jewels, restore them to the Crown, awaken the Sleeping Lord, and restore order to Undlar. Not much is known about these visitors, except that they will be "giants", and there will be six of them. To their alarm, the children find that the inhabitants of Undlar believe them to be the prophesied rescuers.Can six ordinary children surmount deadly peril to find the lost jewels that will heal a broken land?