Mirrorworlds The Crystal War

War reigns in the crystal worldGreen crystals seek help from siblings Carolyn and Tom, well knownto readers of ''Mirror Worlds: The Twelve Books,''in their fight against the red crystals. But there is more at stake, becausethe red crystals also threaten Earth.An exciting adventure through space and time begins. The dragon Dracontor,the trolls Lanudas andLakuno, and many other fantasy creatures als...