In author Marissa Meyer’s sci-fi take on fairy-tale characters, only one is the fairest of them all — at least in her antagonistic eyes.The back story of Queen Levana, the villain of Meyer’s The Lunar Chronicles young-adult fantasy series, is finally revealed in the novel Fairest (Macmillan, out Jan. 27). It’s a surprise prequel chapter of sorts being added to the our-book series that began with Cinder two years ago and will end in November 2015 with Winter.