Volumes III and IV of The Mirror Quartet. Dark Is The Moon: Rulke the Great Betrayer is free at last to use the deadly construct he has spent a thousand years perfecting. To succeed he needs just one thing - Karan's unique sensitive talent. Karan and her lover Llian are lost in the Nightland, trapped in an alien palace that is collapsing about them. Only Rulke can open the gate and send them home to Santhenar, but Karan is terrified he will corrupt Llian. Yggur and Mendark, sworn enemies, struggle to tame the power of the rift. They must seal the gate before Rulke brings forth his construct. If they fail he will ravage the world. And if they succeed, Karan and Llian will be trapped in the Nightland for eternity...The Way Between The Worlds: There is a dark full moon on Mid-Winter's Day. The foretelling has come to pass. Rulke the Charon is unstoppable now. Karan is held captive in desolate Carcharon Tower. Rulke plans to use her to find the Way Between The Worlds. On the mountainside below, the allies await their fate Karan's lover, Llian, is in chains, falsely accused of betraying her to the enemy. As the dark moon rises, Rulke begins to open the Way. If he succeeds, the world will be overwhelmed by the dread armies of the void. There is only one solution - Karan must be the sacrifice.